WO2012150999A1 - Anchor extender assemblies and methods for using the same - Google Patents

Anchor extender assemblies and methods for using the same Download PDF

Info

Publication number
WO2012150999A1
WO2012150999A1 PCT/US2012/027970 US2012027970W WO2012150999A1 WO 2012150999 A1 WO2012150999 A1 WO 2012150999A1 US 2012027970 W US2012027970 W US 2012027970W WO 2012150999 A1 WO2012150999 A1 WO 2012150999A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor
branches
arms
extender
distal
Prior art date
Application number
PCT/US2012/027970
Other languages
French (fr)
Inventor
Jason M. May
William Alan Rezach
Original Assignee
Warsaw Orthopedic, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Warsaw Orthopedic, Inc. filed Critical Warsaw Orthopedic, Inc.
Publication of WO2012150999A1 publication Critical patent/WO2012150999A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7083Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements
    • A61B17/7085Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements for insertion of a longitudinal element down one or more hollow screw or hook extensions, i.e. at least a part of the element within an extension has a component of movement parallel to the extension's axis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7083Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements
    • A61B17/7086Rod reducers, i.e. devices providing a mechanical advantage to allow a user to force a rod into or onto an anchor head other than by means of a rod-to-bone anchor locking element; rod removers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7076Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
    • A61B17/7077Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae
    • A61B17/708Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae with tubular extensions coaxially mounted on the bone anchors

Definitions

  • the present application relates to surgical devices and methods, and more particularly, but not exclusively, to anchor extender assemblies for use during surgical procedures.
  • anchors that can be secured to bone or bony structures. These anchors can be used to apply stabilizing or corrective forces to the bone or bony structures.
  • a wide variety of anchors are provided that are specifically designed to connect to or engage various bones or bony structures.
  • such anchors can include bone posts or spikes that can be anchored into various bones or bony structures.
  • another anchor comprises a hook configured to engage the laminae of the vertebra.
  • Other anchors include spinal screws or bolts having threaded sections configured to be anchored in vertebral bone.
  • the anchors are typically used in conjunction with other implant components used to stabilize the vertebra. These other implant components can include, for example, a stabilization device or connecting element such as a spinal rod or plate.
  • the anchors include a receiver member adapted to engage the connecting element. More particularly, in one form, the receiver member has a channel or opening adapted to receive and engage the connecting element. The receiver member may also be configured to engage a securing member that connects the connecting element to the anchor.
  • Positioning the connecting element into the channel of the receiver member in-situ can be difficult due to interference with surrounding anatomical features such as skin and soft tissues. Moreover, if the channel of the receiver member is not properly aligned with the connecting element, forces may need to be applied to move the anchor and/or stress the connecting element to achieve proper alignment with the receiver member.
  • the anchor extender releasably engaged with an anchor configured for engagement with one or more bones or bony tissues such as, for example, the spinal column.
  • the anchor extender generally includes a first member and second member positioned about and movable relative to the first member.
  • the anchor extender is positionable adjacent to the anchor and movement of the second member relative to the first member toward the anchor as the anchor extender engages the anchor results in lateral displacement of the anchor extender relative to the anchor while the first member engages with a first side of the anchor and the second member engages an opposite second side of the anchor.
  • the anchor extender can be used for guiding a connecting element, such as a spinal rod, into a receiving channel of the anchor.
  • reduction instrumentation can be coupled with the anchor extender and used to reduce the connecting element into the receiving channel of the anchor.
  • one or more instruments for manipulating the positioning of the anchor may also be coupled with the anchor extender.
  • different forms and applications are envisioned.
  • another embodiment of the present application is directed to an apparatus that includes an anchor having a bone engaging portion and a receiver member.
  • the receiver member includes a pair of oppositely positioned branches and a receiving channel positioned between the branches and extending between opposite first and second sides of the receiver member.
  • the apparatus also includes an anchor extender engageable with the anchor.
  • the anchor extender includes a first member having an elongate body extending between a proximal end and an opposite distal end and including oppositely positioned first and second arms each having an engaging portion structured to engage a respective one of the branches on the first side of the receiver member.
  • the anchor extender also includes a second member positioned about the first member and movable relative to the first member between a first position and a second position.
  • the second member further includes a distal portion structured to engage the branches on the second side of the receiver member. Distal movement of the second member relative to the first member from the first position to the second position moves the engaging portions of the first and second arms into engagement with the branches on the first side of the receiver member and the distal portion of the second member along the branches on the second side of the receiver member.
  • an anchor extender in yet another embodiment, includes a first member having a first elongate body extending along a first longitudinal axis between a proximal end and an opposite distal end.
  • the first elongate body also includes a pair of oppositely positioned tabs laterally offset from and extending toward the first longitudinal axis.
  • the anchor extender further includes a second member having a second elongate body extending along a second longitudinal axis between a proximal end and an opposite distal end.
  • the second elongate body includes an elongate passage extending between the proximal and distal ends.
  • the elongate passage includes a first portion positioned adjacent the distal end, a second portion positioned proximally of the first portion, and a transition portion extending obliquely toward the second longitudinal axis in a proximal direction from the first portion to the second portion of the elongate passage.
  • the second member is positionable over the first member and slidably movable relative to the first member across a plurality of positions including an anchor engaging position in which the oppositely positioned tabs are positioned in the elongate passage opposite of and facing the transition portion of the elongate passage.
  • a method in another embodiment, includes providing an anchor having a bone engaging portion and a receiver member, with the receiver member extending along a central axis between a proximal end and an oppositely positioned distal end and further including a pair of oppositely positioned branches and a receiving channel positioned between the branches. The receiving channel extends between opposite first and second sides of the receiver member.
  • the method also includes providing an anchor extender engageable with the anchor, with the anchor extender extending along a longitudinal axis between a proximal end and an opposite distal end.
  • the anchor extender includes a first member having oppositely positioned first and second arms, each including an engaging portion structured to engage with a respective one of the branches on the first side of the receiver member.
  • the anchor extender also includes a second member movably positioned about the first member and including a distal portion structured to engage the branches on the second side of the receiver member.
  • the method further includes positioning the anchor extender adjacent the proximal end of the receiver member with the longitudinal axis of the anchor extender offset from the central axis of the receiver member, and distally moving the second member relative to the first member to releasably couple the anchor extender with the receiver member.
  • Distally moving the second member relative to the first member includes aligning the longitudinal axis with the central axis.
  • Another embodiment of the present application is directed to a unique anchor extender for use in surgical procedures in a patient.
  • Other embodiments include unique methods, techniques, systems, devices, kits, assemblies, equipment, and/or apparatus involving anchor extenders.
  • FIG. 1 is a perspective view of an anchor extender positioned in initial engagement with an anchor and to which reduction instrumentation is coupled.
  • FIG. 2 is a perspective view of a first member of the anchor extender illustrated in
  • FIG. 3 is a side plan view of the first member illustrated in FIG. 2.
  • FIG. 3 A is an enlarged view of the distal portion of the first member illustrated in
  • FIG. 4 is an elongate section view of the first member of FIG. 3 taken along line 4- 4 of FIG. 3.
  • FIG. 4A is an enlarged view of the distal portion of the section view of the first member illustrated in FIG. 4.
  • FIG. 5 is a side plan view of a second member of the anchor extender illustrated in
  • FIG. 6 is an elongate section view of the second member of FIG. 5 taken along line 6-6 of FIG. 5.
  • FIG. 6A is an enlarged view of the distal portion of the section view of the second member illustrated in FIG. 6.
  • FIG. 7 is a perspective view of the second member of the anchor extender illustrated in FIG. 1 including a collar member coupled therewith.
  • FIG. 8 is a side plan view of the anchor extender illustrated in FIG. 1 positioned in initial engagement with an anchor.
  • FIG. 9 is an elongate section view of the anchor extender taken along line 9-9 of
  • FIG. 9A is an enlarged view of the distal portion of the section view of the anchor extender illustrated in FIG. 9.
  • FIG. 10 is a section view of the anchor extender taken along line 10-10 of FIG. 8.
  • FIG. 11 is a side plan view of the anchor extender illustrated in FIG. 1 positioned in further engagement with the anchor.
  • FIG. 12 is an elongate section view of the anchor extender taken along line 12-12 of FIG. 11.
  • FIG. 12A is an enlarged view of the distal portion of the section view of the anchor extender illustrated in FIG. 12.
  • the subject application is generally directed to an anchor extender which can be releasably engaged with an anchor configured for engagement with one or more bones or bony tissues, such as the spinal column, although it should be understood that other skeletal locations are also possible.
  • the anchor extender generally includes a first member and second member positioned about and movable relative to the first member. The anchor extender is positionable adjacent to the anchor and movement of the second member relative to the first member toward the anchor as the anchor extender is engaged with the anchor results in lateral displacement of the anchor extender relative to the anchor while the first member engages a first side of the anchor and the second member engages an opposite second side of the anchor.
  • the anchor extender can be used for guiding a connecting element, such as a spinal rod, into a receiving channel of the anchor.
  • reduction instrumentation can be coupled with the anchor extender, or the anchor extender can be further configured as a reduction instrument, and used to reduce the connecting element into the receiving channel of the anchor.
  • the anchor extender may also be used to manually manipulate the positioning of the anchor or the bones or bony tissues to which it is engaged. Additionally or alternatively, one or more instruments for manipulating the positioning of the anchor or the bones or bony tissues to which it is engaged may also be coupled with the anchor extender.
  • the bone anchor 210 includes a receiver member 212 configured to receive a connecting element 240 and a distal bone engaging portion 214. While not shown, it should be appreciated that the connecting element can extend between and be coupled with one or more additional anchors configured to be engaged with bones or bony tissues adjacent to the anchor 10.
  • the bone engaging portion 214 is a bone screw with a threaded shank structured to engage the bony structure of an underlying vertebra when the bone anchor 210 is engaged to the spinal column.
  • the receiver member 212 extends along a central axis 216 between a proximal end 218 and a distal end 220 and includes a pair of opposing branches 222, 224 defining a channel 226 extending between and opening through opposite first and second sides 228, 230 of the receiver member 212.
  • the branches 222, 224 further define a proximal/distally extending opening that opens through the proximal end 218 of the receiver member 212 to receive a set screw (not shown) structured to engage with internal threading 232 on the branches 222, 224 to secure the connecting element 240 in the channel 226.
  • a set screw (not shown) structured to engage with internal threading 232 on the branches 222, 224 to secure the connecting element 240 in the channel 226.
  • the branch 222 includes a pair of oppositely positioned and laterally facing receptacles 234, 236, each of which is configured for individual engagement with a portion of the anchor extender 10 depending on the orientation of the anchor extender 10 relative to the anchor 210, further details of which will be provided below. Additionally, while not illustrated, it should be appreciated that the branch 224 also includes a pair of oppositely positioned and laterally facing receptacles configured the same as the receptacles 234, 236 of the branch 222. In another non-illustrated form, the branches 222, 224 may each include a single lateral facing receptacle positioned on the same side of the receiver member 212.
  • the bone engaging portion 214 is pivotally received in the receiver member 212 through a distal opening thereof, and structured to interact therewith to provide the anchor 210 with multi-axial capabilities that permit either a selected number of positions or infinitely numbered of positions of the bone engaging portion 212 relative to the receiver member 212.
  • Other forms for the anchor 210 are contemplated, including uni-axial and uni-planar forms.
  • the bone engaging portion 214 can also be in the form of a spike, staple, hook, fusion device, cannulated screw, fenestrated screw, interbody device, intrabody device, clamp, plate, suture anchor, bolt, pin or other bone engaging member.
  • the receiver member 214 can also be in the form of a saddle, yoke, eye-bolt or through- hole, side opening member, bottom opening member, top-opening member, eyelet, or any other structure engageable to the connecting element 240 and the anchor extender 10.
  • the receiver member 214 in the form of a side opening member, it includes a proximal branch and an oppositely positioned distal branch which cooperate to define a laterally opening channel that also extends between and opens through opposite first and second sides of the receiver member.
  • the distal branch can be provided with an opening configured to receive a bone engaging portion in a multi-axial or uni-axial configuration, although forms in which the receiver member and bone engaging portion are integrally formed are also possible.
  • the proximal branch can also be provided with a threaded aperture configured to receive and engage with a set screw to secure a connecting element in the laterally opening channel.
  • a bone anchor including a laterally opening channel is used in the TSRH® SILOTM Spinal System commercially available from Medtronic Spinal and Biologies, 2600 Sofamor Danek Drive, Memphis, TN, 38132.
  • other bone anchors including laterally opening channels are also possible.
  • use of the anchor extender 10 with a bone anchor including a laterally opening channel for receiving the connecting element 240 may be carried out in a manner substantially similar to that discussed below in connection with the use of the anchor extender 10 with the illustrated bone anchor 210.
  • the connecting element 240 is a rigid rod that has a substantially linear configuration between its ends. However, it is contemplated that the connecting element 240 can have a curvature that extends along a constant arc, a varying arc, and/or is compounded between its ends. Additionally, in other forms, the connecting element 240 can include any known configuration for a rod, implant, or fastener.
  • the connecting element 240 can be non-rigid, elastic and/or super-elastic and in the form of a cable, band, wire, or artificial ligament that is used in tethering or guiding, and/or in other surgical procedures, It should also be appreciated that other forms in which the anchor extender 10 is used in the absence of the connecting element 240 are also contemplated.
  • the anchor extender 10 generally extends along a longitudinal axis L between a proximal end 12 and an opposite distal end 14 which is configured for engagement with the anchor 210, further details of which will be provided below.
  • the anchor extender 10 also includes a first member 16 and a second member 18 positioned about and slidably movable relative to the first member 16.
  • the first member 16 includes an elongate body 20 that extends along longitudinal axis L between a proximal end 22 and an opposite distal end 24.
  • the elongate body 20 includes a proximal portion 26 from which first and second spaced apart arms 28, 30 extend, and also including an outwardly flared or tapered portion 38 that defines a distal facing surface 40.
  • a groove 41 is formed in the elongate body 20 adjacent to the distal facing surface 40 and includes a proximal portion 41a and a distal portion 41b.
  • the distal facing surface 40 and the groove 41 are generally configured to cooperate and engage with a collar member coupled with the second member 18, further details of which will be provided below.
  • the elongate body 20 generally has a substantially rigid or inflexible configuration such that movement or flexing of the arms 28, 30 relative to one another and/or the proximal portion 26 will be substantially or entirely eliminated.
  • the elongate body 20 has a flexible configuration that facilitates movement or flexing of the arms 28, 30 relative to one another and/or the proximal portion 26 are also possible.
  • an elongate passage 32 extends through the elongate body 20 from the proximal end 22 to the distal end 24. Additionally, a distally opening elongated slot 34 is positioned between the arms 28, 30 and communicates with the elongate passage 32.
  • the first member 16 also includes an opening 36 that communicates with the elongate passage 32 and is configured to cooperate with the reduction
  • the arm 28 also includes a longitudinal tongue 42 positioned adjacent a longitudinal recess 42a (FIG. 10), and the arm 30 includes a longitudinal tongue 44 positioned adjacent a longitudinal recess 44a (FIG. 10). As illustrated in FIG. 10, the longitudinal tongues 42, 44 and recesses 42a, 44a are generally configured to engage with corresponding structure(s) on the second member 18.
  • the arms 28, 30 each include an engaging portion adjacent the distal end 24 of the elongate body 20 configured to engage the receiver member 212 of the anchor 210. More particularly, with reference to FIG. 3A, the arm 28 includes an engaging portion having an elongate tab 46 positioned in a recess 48 defined by a distal facing surface 50, a side surface 52, and an intermediate surface 54 from which the elongate tab 46 extends. As illustrated in FIGS. 3A and 4A, the arm 30 includes an engaging portion having an elongate tab 56 positioned in a recess 58 defined by a distal facing surface 60, a side surface 62, and an intermediate surface 64 from which the elongate tab 56 extends.
  • the elongate tabs 46, 56 are generally configured to be received in and engage with a respective one of the laterally facing receptacles on the branches 222, 224 on a single side of the receiver member 212. As illustrated in FIGS. 3 and 4, the elongate tabs 46, 56 are positioned on opposite sides of and laterally offset from the longitudinal axis L, and extend substantially parallel with one another away from the arms 28, 30 toward the longitudinal axis L. While not previously discussed, it should be appreciated that the recesses 48, 58 cooperate to define a socket 66 (FIG. 3A) configured to receive a portion of the branches 222, 224 of the receiver member 212, further details of which will be provided below in connection with FIGS. 8-9A and 11-12A.
  • the second member 18 includes an elongate body 70 that extends along longitudinal axis L between a proximal end 72 and an opposite distal end 74.
  • the elongate body 70 further includes a proximal portion 76 from which first and second arms 78, 80 spaced apart from one another and positioned on opposite sides of the longitudinal axis L extend.
  • an elongate passage 82 extends through the elongate body 70 from the proximal end 72 to the distal end 74 and is configured to receive a portion of the first member 16 therein.
  • a distally opening elongated slot 86 is positioned between the arms 78, 80 and communicates with the elongate passage 82.
  • the elongate body 70 also includes a pair of oppositely positioned guide surfaces 88, 90 positioned adjacent opposite sides of the elongated slot 86 and extending obliquely to the longitudinal axis L.
  • the guide surfaces 88, 90 can assist in guiding the connecting element 240 into the elongated slot 86.
  • the elongate body 70 also includes a pair of internally positioned longitudinal recesses 92, 94 positioned opposite one another and configured to engage the longitudinal tongues 42, 44, respectively, of the arms 28, 30.
  • the elongate body 70 also includes a pair of longitudinal tongues 92a, 94a positioned adjacent the longitudinal recesses 92, 94 and configured to engage with the longitudinal recesses 42a, 44a, respectively, of the arms 28, 30.
  • the first and second members 16, 18 cooperate with one another to prevent splaying of the arms 28, 30.
  • the first and second members 16, 18 may alternatively be arranged and provided without any anti- splay arrangement.
  • the elongate passage 82 opens through the distal end 74 and generally provides a receptacle configured to receive a portion of the receiver member 212 therein. More particularly, as illustrated in FIG. 6A, the elongate passage 82 includes a first portion 96 positioned adjacent to distal end 74 and a second portion 98 positioned proximal the first portion 96. A transition portion 100 extends between the first and second portions 96, 98 and obliquely toward the longitudinal axis L in a proximal direction.
  • the first portion 96 of the elongate passage 82 includes a first cross-sectional dimension 102 that is greater than a second cross-sectional dimension 104 of the second portion 98 of the elongate passage 82.
  • the elongate passage 82 also includes a generally linear surface 106 positioned opposite the transition portion 100. While the details of the elongate passage 82 adjacent to the distal end 74 of the elongate body 70 have been described in connection with the illustration of the arm 80 in FIGS. 6 and 6A, it should also be appreciated that the foregoing features of the elongate passage 82 are also present in connection with the arm 78, which is configured similar to the arm 80.
  • the elongate body 70 also includes a pair of oppositely positioned spring tabs 84, 85 configured to engage with or bear against the first member 16 when positioned in the elongate passage 82.
  • the arm 80 includes an arcuate notch 108 extending proximally from the distal end 74.
  • the arm 78 also includes an arcuate notch extending proximally from the distal end 74 and positioned opposite the arcuate notch 108.
  • the second member 18 is positionable over the first member 16.
  • first and second arms 28, 30 of the first member 16 are positioned in the elongate passage 82 between the transition portion 100 and the linear surface 106 such that the elongated tabs 46, 56 are generally positioned opposite of and extend toward the transition portion 100.
  • a collar member 110 may be coupled with the proximal end 72 of the elongate body 70 of the second member 18, as illustrated in FIGS. 1 and 7. It should also be appreciated that forms in which the collar member 1 10 is absent from the anchor extender 10 are contemplated.
  • the collar member 110 is rotatably coupled with the elongate body 70 such that it can be rotated relative to the second member 18.
  • the collar member 1 10 includes an inwardly extending pin 1 12 engageable within the groove 41 on the first member 16 when the second member 18 is positioned over the first member 16.
  • the second member 18 can be moved distally from a first position relative to the first member 16 where the pin 1 12 is positioned in the proximal portion 41a of the groove 41 and the collar member 110 abuts the distal facing surface 40 by rotating the collar member 1 10 relative to the second member 18.
  • the pin 112 is distally guided into the distal portion 41b of the groove 41, which in turn results in distal displacement of the second member 18 to a second position relative to the first member 16.
  • the collar member 1 10 can be rotated in an opposite direction such that the pin 1 12 is proximally guided into the proximal portion 41a of the groove 41, and the second member 18 is proximally returned to its first position relative to the first member 16.
  • the collar member 1 10 includes internal threads configured to engage with external threads on the first member 16 such that the interaction between the internal and external threads results in proximal and distal displacement of the second member 18 relative to the first member 16 as the collar member 110 is rotated in opposite directions relative to the first member 16.
  • the anchor extender 10 may be positioned adjacent to the receiver member 212 such that the anchor extender 10 is initially engaged therewith. More particularly, the anchor extender 10 is positionable relative to the anchor 210 such that a portion of the receiver member 212 is positioned in the elongate passage 82. As illustrated in FIG.
  • a proximal portion of the branch 222 is positioned in the first portion 96 of the elongate passage 82 such that the proximal end 218 of the receiver member 212 is positioned in abutment against the transition portion 100 and the second member 18 engages the branch 222 on the second side 230 of the receiver member 212.
  • the branch 222 is further positioned between the first arm 28 and the second member 18. Additionally, the arm 28 is positioned adjacent to the first side 228 of the receiver member 212 such that the elongate tab 46 faces the lateral receptacle 234 of the branch 222.
  • a gap G is positioned between the elongate tab 46 and the first side 228 of the receiver member 212 along the branch 222.
  • a portion of the branch 222 is also received in the recess 48 such that a portion of the side surface 52 extends along an external surface of the branch 222 between the opposite first and second sides 228, 230 of the receiver member 212.
  • a portion of the branch 224 of the receiver member 212 is positioned in the elongate passage 82 and relative to the arm 30 and the second member 18 in the same manner as discussed above in connection with the branch 222. More specifically, a proximal portion of the branch 224 is positioned in the first portion 96 of the elongate passage 82 such that the proximal end 218 of the receiver member 212 is positioned in abutment against the transition portion 100, and the second member 18 engages the branch 224 on the second side 230 of the receiver member 212.
  • the branch 224 is further positioned between the second arm 30 and the second member 18.
  • the arm 30 is positioned adjacent the first side 228 of the receiver member 212 such that the elongate tab 56 faces the lateral receptacle (not shown) of the branch 224. However, a gap will also extend between the elongate tab 56 and the first side 228 of the receiver member 212 along the branch 224. A portion of the branch 224 is also received in the recess 58 such that a portion of the side surface 62 extends along an external surface of the branch 224 between the opposite first and second sides 228, 230 of the receiver member 212.
  • the anchor extender 10 can be initially or provisionally engaged with the anchor 210 such that a portion of the branches 222, 224 on the first side 228 of the receiver member 212 are positioned in the socket 66 defined by the arms 28, 30, and a portion of the branches 222, 224 on the second side 230 of the receiver member 212 are positioned in the elongate passage 82.
  • the longitudinal axis L of the anchor extender 10 is laterally offset from the central axis 216 of the receiver member 212 when the anchor extender 10 is initially engaged with the anchor 210 in this manner.
  • the anchor extender 10 is readily disengageable from the anchor 210 as it is axially moved in a proximal direction relative to the anchor 210.
  • the axial positioning of the anchor extender 10 relative to the anchor 210 may also be fixed upon further engagement of the anchor extender 10 with the anchor 210, further details of which will be provided below in connection with FIGS. 11-12A.
  • the anchor extender 10 can be further engaged with the anchor 210 by distally displacing the second member 18 relative to the first member 16. As the second member 18 is distally displaced, the transition portion 100 of the elongate passage 82 engages with the proximal end 218 of the receiver member 212 on the branches 222, 224 and guides the proximal end 218 into the second portion 98 of the elongate passage 82.
  • the second member 218 is laterally displaced relative to the anchor 210 as the proximal end 218 is guided into the second portion 98 of the elongate passage 82, which in turn displaces the arms 28, 30 toward the first side 228 of the receiver member 212 such that the elongate tabs 46, 56 are moved into engagement with the lateral receptacles on the branches 222, 224 on the first side 228 of the receiver member 212.
  • the longitudinal axis L of the anchor extender 10 and the central axis 216 of the receiver member 212 are aligned with one another, as illustrated in FIG. 12A.
  • the anchor extender 10 is engaged with the anchor 210 such that it is not readily disengageable from the anchor 210 upon proximal movement of the anchor extender 10. Rather, in order to disengage the anchor extender 10 from the anchor 210 in this arrangement, the second member 18 is proximally displaced relative to the first member 16 to facilitate disengagement of the elongated tabs 46, 56 from the lateral receptacles of the branches 222, 224. While not previously discussed, it should be appreciated that while FIG. 12A illustrates engagement of the anchor extender 210 with the branch 222, engagement of the anchor extender 10 with the branch 224 will occur in the same manner.
  • the distal ends 24, 74 of the first and second members 16, 18 are generally aligned with one another in a proximal/distal direction, and the elongate tabs 46, 56 are positioned in the elongate passage 82 opposite of and facing toward the transition portion 100 of the elongate passage 82.
  • the branch 222 is engaged on the first side 228 by the arm 28 of the first member 16 and on the second side 230 by the arm 78 of the second member 18, and the branch 224 is engaged on the first side 228 by the arm 30 of the first member 16 and on the second side 230 by the arm 80 of the second member 18.
  • the channel 226 is unobstructed by the first and second members 16, 18, and the slots 34, 86 of the first and second members 16, 18, respectively, align with one another and provide access to the channel 226.
  • the connecting element 240 may be guided along the slots 34, 86 into the channel 226.
  • the elongate passages 32, 82 cooperate with one another to provide access through the anchor extender 10 to the channel 226 to facilitate engagement of a set screw with the internal threading 232 to lock the connecting element 240 in the channel 226.
  • the anchor extender 10 can be engaged with the anchor 210 to provide assistance in performing a variety of aspects associated with a surgical procedure, non-limiting examples of which include guiding and/or reducing the connecting element 240 into the channel 226 and/or facilitating rotation or manipulation of the anchor 210 to facilitate alignment of the channel 226 with the connecting element 240.
  • the reduction instrumentation 310 is coupled to the anchor extender 10 and configured to facilitate reduction of the connecting element 240 into the channel 226. While not illustrated in FIG. 1, it should be appreciated that the anchor extender 10 can be engaged with the anchor 210 in the manner discussed above in connection with FIG. 12A while the connecting element 240 is reduced into the channel 226.
  • the reduction instrumentation 310 generally includes a collar portion 312 positioned about the first member 16 and to which a release member 314 is pivotably coupled.
  • the release member 314 generally includes an engaging portion (not shown) positioned in the elongate passage 32 of the first member 16 through the opening 36 and configured to engage with external threading of a reduction member 316.
  • the reduction member 316 is rotatably coupled with a connecting element engaging portion 318 and, when engaged with the release member 314, distally advances or proximally withdraws the engaging portion 318 upon rotation in opposite directions relative to the anchor extender 10.
  • the release member 314 is also generally configured to facilitate distal movement of the reduction member 316 relative to the anchor extender 10 without rotation of the reduction member 316 when it is engaged with the release member 314, and to prevent proximal movement of the reduction member 316 relative to the anchor extender 10 without rotation of the reduction member 316 when it is engaged with the release member 314.
  • the release member 314 may also be displaced from engagement with the reduction member 316, in which case the reduction member 316 may be readily displaced relative to the anchor inserter 10 in both proximal and distal directions without rotation.
  • the reduction member 316 can be distally advanced, either by rotation, pushing without rotation, or a combination of the two, in order to seat the connecting element 240 in the channel 226.
  • a set screw and related driver can be advanced through a hollow interior 320 of the reduction member 316 and engaged with the anchor 210 in order to secure the connecting element 240 in the channel 226.
  • the anchor extender 10 can be disengaged from the anchor 210 and removed, along with the reduction instrumentation 310, from the surgical site adjacent the anchor 210.
  • one or more instruments configured for adjusting, rotating or manipulating the position of the anchor 210 or the bone or bony tissue to which it is engaged may also be coupled with the anchor extender 10.
  • Non- limiting examples of such instruments include those useful in derotating, compressing, distracting or otherwise adjusting the relative positioning of bones or bony tissues.
  • the anchor extender 10 can be engaged with the anchor 210 either before or after it has been engaged in bone or bony tissue. Similarly, in one form, the anchor extender 10 can be used during placement and engagement of the anchor 210 in the respective bone or bony tissue.
  • the anchor extender 10 can be used in connection with surgical procedures for stabilizing one or more segments of the spinal column.
  • the use of the anchor extender 10 in other surgical procedures is also contemplated, including those performed in anatomical locations other than the spinal column.
  • the methods, techniques, assemblies, devices, apparatuses, systems and instrumentation described herein may also be used in surgical procedures involving animals, or in demonstrations for training, education, marketing, sales and/or advertising purposes.
  • the methods, techniques, assemblies, devices, apparatuses, systems and instrumentation described herein may also be used on or in connection with a non-living subject such as a cadaver, training aid or model, or in connection with testing of surgical systems, surgical procedures, orthopedic devices and/or apparatus.

Abstract

One nonlimiting embodiment is directed to an anchor extender releasably engaged with an anchor configured for engagement with one or more bones or bony portions. The anchor extender generally includes a first member and a second member positioned about and movable relative to the first member. The anchor extender is positionable adjacent the anchor and movement of the second member relative to the first member toward the anchor as the anchor extender is engaged with the anchor results in lateral displacement of the anchor extender relative to the anchor while the first member engages with a first side of the anchor and the second member engages with an opposite second side of the anchor. However, in other embodiments, different forms and applications are envisioned.

Description

ANCHOR EXTENDER ASSEMBLIES AND METHODS FOR USING THE SAME
BACKGROUND
The present application relates to surgical devices and methods, and more particularly, but not exclusively, to anchor extender assemblies for use during surgical procedures.
Several surgical procedures utilize anchors that can be secured to bone or bony structures. These anchors can be used to apply stabilizing or corrective forces to the bone or bony structures. A wide variety of anchors are provided that are specifically designed to connect to or engage various bones or bony structures. For example, such anchors can include bone posts or spikes that can be anchored into various bones or bony structures. Additionally, another anchor comprises a hook configured to engage the laminae of the vertebra. Other anchors include spinal screws or bolts having threaded sections configured to be anchored in vertebral bone. With reference to spinal surgery, the anchors are typically used in conjunction with other implant components used to stabilize the vertebra. These other implant components can include, for example, a stabilization device or connecting element such as a spinal rod or plate. Typically, the anchors include a receiver member adapted to engage the connecting element. More particularly, in one form, the receiver member has a channel or opening adapted to receive and engage the connecting element. The receiver member may also be configured to engage a securing member that connects the connecting element to the anchor.
Positioning the connecting element into the channel of the receiver member in-situ can be difficult due to interference with surrounding anatomical features such as skin and soft tissues. Moreover, if the channel of the receiver member is not properly aligned with the connecting element, forces may need to be applied to move the anchor and/or stress the connecting element to achieve proper alignment with the receiver member.
Manipulation of the anchor and/or the connecting element can be awkward or
cumbersome due to, amongst other things, the limited amount of space available to manipulate the implant components and the required surgical instruments. Thus, there remains a need for further improvements in this area. SUMMARY
One nonlimiting embodiment of the present application is directed to an anchor extender releasably engaged with an anchor configured for engagement with one or more bones or bony tissues such as, for example, the spinal column. The anchor extender generally includes a first member and second member positioned about and movable relative to the first member. The anchor extender is positionable adjacent to the anchor and movement of the second member relative to the first member toward the anchor as the anchor extender engages the anchor results in lateral displacement of the anchor extender relative to the anchor while the first member engages with a first side of the anchor and the second member engages an opposite second side of the anchor. Amongst other things, the anchor extender can be used for guiding a connecting element, such as a spinal rod, into a receiving channel of the anchor. Moreover, in one non-limiting form, reduction instrumentation can be coupled with the anchor extender and used to reduce the connecting element into the receiving channel of the anchor. Additionally or alternatively, one or more instruments for manipulating the positioning of the anchor may also be coupled with the anchor extender. However, in other embodiments, different forms and applications are envisioned.
For example, another embodiment of the present application is directed to an apparatus that includes an anchor having a bone engaging portion and a receiver member. The receiver member includes a pair of oppositely positioned branches and a receiving channel positioned between the branches and extending between opposite first and second sides of the receiver member. The apparatus also includes an anchor extender engageable with the anchor. The anchor extender includes a first member having an elongate body extending between a proximal end and an opposite distal end and including oppositely positioned first and second arms each having an engaging portion structured to engage a respective one of the branches on the first side of the receiver member. The anchor extender also includes a second member positioned about the first member and movable relative to the first member between a first position and a second position. The second member further includes a distal portion structured to engage the branches on the second side of the receiver member. Distal movement of the second member relative to the first member from the first position to the second position moves the engaging portions of the first and second arms into engagement with the branches on the first side of the receiver member and the distal portion of the second member along the branches on the second side of the receiver member.
In yet another embodiment, an anchor extender includes a first member having a first elongate body extending along a first longitudinal axis between a proximal end and an opposite distal end. The first elongate body also includes a pair of oppositely positioned tabs laterally offset from and extending toward the first longitudinal axis. The anchor extender further includes a second member having a second elongate body extending along a second longitudinal axis between a proximal end and an opposite distal end. The second elongate body includes an elongate passage extending between the proximal and distal ends. The elongate passage includes a first portion positioned adjacent the distal end, a second portion positioned proximally of the first portion, and a transition portion extending obliquely toward the second longitudinal axis in a proximal direction from the first portion to the second portion of the elongate passage. The second member is positionable over the first member and slidably movable relative to the first member across a plurality of positions including an anchor engaging position in which the oppositely positioned tabs are positioned in the elongate passage opposite of and facing the transition portion of the elongate passage.
In another embodiment, a method includes providing an anchor having a bone engaging portion and a receiver member, with the receiver member extending along a central axis between a proximal end and an oppositely positioned distal end and further including a pair of oppositely positioned branches and a receiving channel positioned between the branches. The receiving channel extends between opposite first and second sides of the receiver member. The method also includes providing an anchor extender engageable with the anchor, with the anchor extender extending along a longitudinal axis between a proximal end and an opposite distal end. The anchor extender includes a first member having oppositely positioned first and second arms, each including an engaging portion structured to engage with a respective one of the branches on the first side of the receiver member. The anchor extender also includes a second member movably positioned about the first member and including a distal portion structured to engage the branches on the second side of the receiver member. The method further includes positioning the anchor extender adjacent the proximal end of the receiver member with the longitudinal axis of the anchor extender offset from the central axis of the receiver member, and distally moving the second member relative to the first member to releasably couple the anchor extender with the receiver member. Distally moving the second member relative to the first member includes aligning the longitudinal axis with the central axis.
Another embodiment of the present application is directed to a unique anchor extender for use in surgical procedures in a patient. Other embodiments include unique methods, techniques, systems, devices, kits, assemblies, equipment, and/or apparatus involving anchor extenders.
Further embodiments, forms, features, aspects, benefits, objects and advantages of the present application shall become apparent from the detailed description and figures provided herewith.
BRIEF DESCRIPTION OF THE FIGURES
FIG. 1 is a perspective view of an anchor extender positioned in initial engagement with an anchor and to which reduction instrumentation is coupled.
FIG. 2 is a perspective view of a first member of the anchor extender illustrated in
FIG. 1.
FIG. 3 is a side plan view of the first member illustrated in FIG. 2.
FIG. 3 A is an enlarged view of the distal portion of the first member illustrated in
FIG. 3.
FIG. 4 is an elongate section view of the first member of FIG. 3 taken along line 4- 4 of FIG. 3.
FIG. 4A is an enlarged view of the distal portion of the section view of the first member illustrated in FIG. 4.
FIG. 5 is a side plan view of a second member of the anchor extender illustrated in
FIG. 1.
FIG. 6 is an elongate section view of the second member of FIG. 5 taken along line 6-6 of FIG. 5.
FIG. 6A is an enlarged view of the distal portion of the section view of the second member illustrated in FIG. 6.
FIG. 7 is a perspective view of the second member of the anchor extender illustrated in FIG. 1 including a collar member coupled therewith.
FIG. 8 is a side plan view of the anchor extender illustrated in FIG. 1 positioned in initial engagement with an anchor. FIG. 9 is an elongate section view of the anchor extender taken along line 9-9 of
FIG. 8.
FIG. 9A is an enlarged view of the distal portion of the section view of the anchor extender illustrated in FIG. 9.
FIG. 10 is a section view of the anchor extender taken along line 10-10 of FIG. 8.
FIG. 11 is a side plan view of the anchor extender illustrated in FIG. 1 positioned in further engagement with the anchor.
FIG. 12 is an elongate section view of the anchor extender taken along line 12-12 of FIG. 11.
FIG. 12A is an enlarged view of the distal portion of the section view of the anchor extender illustrated in FIG. 12.
DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended. Any such alterations and further modifications in the illustrated devices and described methods, and any such further applications of the principles of the invention as illustrated herein are contemplated as would normally occur to one skilled in the art to which the invention relates.
The subject application is generally directed to an anchor extender which can be releasably engaged with an anchor configured for engagement with one or more bones or bony tissues, such as the spinal column, although it should be understood that other skeletal locations are also possible. The anchor extender generally includes a first member and second member positioned about and movable relative to the first member. The anchor extender is positionable adjacent to the anchor and movement of the second member relative to the first member toward the anchor as the anchor extender is engaged with the anchor results in lateral displacement of the anchor extender relative to the anchor while the first member engages a first side of the anchor and the second member engages an opposite second side of the anchor. Amongst other things, the anchor extender can be used for guiding a connecting element, such as a spinal rod, into a receiving channel of the anchor. Moreover, in one non-limiting form, reduction instrumentation can be coupled with the anchor extender, or the anchor extender can be further configured as a reduction instrument, and used to reduce the connecting element into the receiving channel of the anchor. In one or more forms, the anchor extender may also be used to manually manipulate the positioning of the anchor or the bones or bony tissues to which it is engaged. Additionally or alternatively, one or more instruments for manipulating the positioning of the anchor or the bones or bony tissues to which it is engaged may also be coupled with the anchor extender.
Referring now to FIG. 1, there is shown an anchor extender 10 positioned adjacent to a bone anchor 210 and to which reduction instrumentation 310 is coupled, further details of which will be provided below. The bone anchor 210 includes a receiver member 212 configured to receive a connecting element 240 and a distal bone engaging portion 214. While not shown, it should be appreciated that the connecting element can extend between and be coupled with one or more additional anchors configured to be engaged with bones or bony tissues adjacent to the anchor 10. In the illustrated embodiment, the bone engaging portion 214 is a bone screw with a threaded shank structured to engage the bony structure of an underlying vertebra when the bone anchor 210 is engaged to the spinal column. With reference to FIGS. 8 and 9A, the receiver member 212 extends along a central axis 216 between a proximal end 218 and a distal end 220 and includes a pair of opposing branches 222, 224 defining a channel 226 extending between and opening through opposite first and second sides 228, 230 of the receiver member 212. The branches 222, 224 further define a proximal/distally extending opening that opens through the proximal end 218 of the receiver member 212 to receive a set screw (not shown) structured to engage with internal threading 232 on the branches 222, 224 to secure the connecting element 240 in the channel 226. As illustrated in FIG. 12A, the branch 222 includes a pair of oppositely positioned and laterally facing receptacles 234, 236, each of which is configured for individual engagement with a portion of the anchor extender 10 depending on the orientation of the anchor extender 10 relative to the anchor 210, further details of which will be provided below. Additionally, while not illustrated, it should be appreciated that the branch 224 also includes a pair of oppositely positioned and laterally facing receptacles configured the same as the receptacles 234, 236 of the branch 222. In another non-illustrated form, the branches 222, 224 may each include a single lateral facing receptacle positioned on the same side of the receiver member 212.
In the illustrated form, the bone engaging portion 214 is pivotally received in the receiver member 212 through a distal opening thereof, and structured to interact therewith to provide the anchor 210 with multi-axial capabilities that permit either a selected number of positions or infinitely numbered of positions of the bone engaging portion 212 relative to the receiver member 212. Other forms for the anchor 210 are contemplated, including uni-axial and uni-planar forms. The bone engaging portion 214 can also be in the form of a spike, staple, hook, fusion device, cannulated screw, fenestrated screw, interbody device, intrabody device, clamp, plate, suture anchor, bolt, pin or other bone engaging member. The receiver member 214 can also be in the form of a saddle, yoke, eye-bolt or through- hole, side opening member, bottom opening member, top-opening member, eyelet, or any other structure engageable to the connecting element 240 and the anchor extender 10.
In one non-limiting form in which the receiver member 214 is in the form of a side opening member, it includes a proximal branch and an oppositely positioned distal branch which cooperate to define a laterally opening channel that also extends between and opens through opposite first and second sides of the receiver member. In a further aspect of this form, the distal branch can be provided with an opening configured to receive a bone engaging portion in a multi-axial or uni-axial configuration, although forms in which the receiver member and bone engaging portion are integrally formed are also possible.
Additionally, the proximal branch can also be provided with a threaded aperture configured to receive and engage with a set screw to secure a connecting element in the laterally opening channel. One non-limiting example of a bone anchor including a laterally opening channel is used in the TSRH® SILO™ Spinal System commercially available from Medtronic Spinal and Biologies, 2600 Sofamor Danek Drive, Memphis, TN, 38132. However, it should be understood that other bone anchors including laterally opening channels are also possible. It should also be understood that use of the anchor extender 10 with a bone anchor including a laterally opening channel for receiving the connecting element 240 may be carried out in a manner substantially similar to that discussed below in connection with the use of the anchor extender 10 with the illustrated bone anchor 210.
In the illustrated embodiment, the connecting element 240 is a rigid rod that has a substantially linear configuration between its ends. However, it is contemplated that the connecting element 240 can have a curvature that extends along a constant arc, a varying arc, and/or is compounded between its ends. Additionally, in other forms, the connecting element 240 can include any known configuration for a rod, implant, or fastener. It is further contemplated that the connecting element 240 can be non-rigid, elastic and/or super-elastic and in the form of a cable, band, wire, or artificial ligament that is used in tethering or guiding, and/or in other surgical procedures, It should also be appreciated that other forms in which the anchor extender 10 is used in the absence of the connecting element 240 are also contemplated.
Referring collectively to FIGS. 1 and 8, the anchor extender 10 generally extends along a longitudinal axis L between a proximal end 12 and an opposite distal end 14 which is configured for engagement with the anchor 210, further details of which will be provided below. The anchor extender 10 also includes a first member 16 and a second member 18 positioned about and slidably movable relative to the first member 16.
Referring collectively to FIGS. 2-4A, further details of the first member 16 will be provided. The first member 16 includes an elongate body 20 that extends along longitudinal axis L between a proximal end 22 and an opposite distal end 24. The elongate body 20 includes a proximal portion 26 from which first and second spaced apart arms 28, 30 extend, and also including an outwardly flared or tapered portion 38 that defines a distal facing surface 40. A groove 41 is formed in the elongate body 20 adjacent to the distal facing surface 40 and includes a proximal portion 41a and a distal portion 41b. The distal facing surface 40 and the groove 41 are generally configured to cooperate and engage with a collar member coupled with the second member 18, further details of which will be provided below. In the illustrated form, the elongate body 20 generally has a substantially rigid or inflexible configuration such that movement or flexing of the arms 28, 30 relative to one another and/or the proximal portion 26 will be substantially or entirely eliminated. However, it should be appreciated that forms in which the elongate body 20 has a flexible configuration that facilitates movement or flexing of the arms 28, 30 relative to one another and/or the proximal portion 26 are also possible.
As best seen in FIG. 4, an elongate passage 32 extends through the elongate body 20 from the proximal end 22 to the distal end 24. Additionally, a distally opening elongated slot 34 is positioned between the arms 28, 30 and communicates with the elongate passage 32. The first member 16 also includes an opening 36 that communicates with the elongate passage 32 and is configured to cooperate with the reduction
instrumentation 310 when coupled with the anchor extender 10, further details of which will be provided below. The arm 28 also includes a longitudinal tongue 42 positioned adjacent a longitudinal recess 42a (FIG. 10), and the arm 30 includes a longitudinal tongue 44 positioned adjacent a longitudinal recess 44a (FIG. 10). As illustrated in FIG. 10, the longitudinal tongues 42, 44 and recesses 42a, 44a are generally configured to engage with corresponding structure(s) on the second member 18.
The arms 28, 30 each include an engaging portion adjacent the distal end 24 of the elongate body 20 configured to engage the receiver member 212 of the anchor 210. More particularly, with reference to FIG. 3A, the arm 28 includes an engaging portion having an elongate tab 46 positioned in a recess 48 defined by a distal facing surface 50, a side surface 52, and an intermediate surface 54 from which the elongate tab 46 extends. As illustrated in FIGS. 3A and 4A, the arm 30 includes an engaging portion having an elongate tab 56 positioned in a recess 58 defined by a distal facing surface 60, a side surface 62, and an intermediate surface 64 from which the elongate tab 56 extends. The elongate tabs 46, 56 are generally configured to be received in and engage with a respective one of the laterally facing receptacles on the branches 222, 224 on a single side of the receiver member 212. As illustrated in FIGS. 3 and 4, the elongate tabs 46, 56 are positioned on opposite sides of and laterally offset from the longitudinal axis L, and extend substantially parallel with one another away from the arms 28, 30 toward the longitudinal axis L. While not previously discussed, it should be appreciated that the recesses 48, 58 cooperate to define a socket 66 (FIG. 3A) configured to receive a portion of the branches 222, 224 of the receiver member 212, further details of which will be provided below in connection with FIGS. 8-9A and 11-12A.
As illustrated in FIG. 5, the second member 18 includes an elongate body 70 that extends along longitudinal axis L between a proximal end 72 and an opposite distal end 74. The elongate body 70 further includes a proximal portion 76 from which first and second arms 78, 80 spaced apart from one another and positioned on opposite sides of the longitudinal axis L extend. As illustrated in FIG. 6, an elongate passage 82 extends through the elongate body 70 from the proximal end 72 to the distal end 74 and is configured to receive a portion of the first member 16 therein. Additionally, a distally opening elongated slot 86 is positioned between the arms 78, 80 and communicates with the elongate passage 82. The elongate body 70 also includes a pair of oppositely positioned guide surfaces 88, 90 positioned adjacent opposite sides of the elongated slot 86 and extending obliquely to the longitudinal axis L. The guide surfaces 88, 90 can assist in guiding the connecting element 240 into the elongated slot 86. As illustrated in FIG. 10, the elongate body 70 also includes a pair of internally positioned longitudinal recesses 92, 94 positioned opposite one another and configured to engage the longitudinal tongues 42, 44, respectively, of the arms 28, 30. The elongate body 70 also includes a pair of longitudinal tongues 92a, 94a positioned adjacent the longitudinal recesses 92, 94 and configured to engage with the longitudinal recesses 42a, 44a, respectively, of the arms 28, 30. In this arrangement, the first and second members 16, 18 cooperate with one another to prevent splaying of the arms 28, 30. However, in other non-illustrated forms, the first and second members 16, 18 may alternatively be arranged and provided without any anti- splay arrangement.
The elongate passage 82 opens through the distal end 74 and generally provides a receptacle configured to receive a portion of the receiver member 212 therein. More particularly, as illustrated in FIG. 6A, the elongate passage 82 includes a first portion 96 positioned adjacent to distal end 74 and a second portion 98 positioned proximal the first portion 96. A transition portion 100 extends between the first and second portions 96, 98 and obliquely toward the longitudinal axis L in a proximal direction. In this arrangement, the first portion 96 of the elongate passage 82 includes a first cross-sectional dimension 102 that is greater than a second cross-sectional dimension 104 of the second portion 98 of the elongate passage 82. The elongate passage 82 also includes a generally linear surface 106 positioned opposite the transition portion 100. While the details of the elongate passage 82 adjacent to the distal end 74 of the elongate body 70 have been described in connection with the illustration of the arm 80 in FIGS. 6 and 6A, it should also be appreciated that the foregoing features of the elongate passage 82 are also present in connection with the arm 78, which is configured similar to the arm 80.
The elongate body 70 also includes a pair of oppositely positioned spring tabs 84, 85 configured to engage with or bear against the first member 16 when positioned in the elongate passage 82. Additionally, in the illustrated form, the arm 80 includes an arcuate notch 108 extending proximally from the distal end 74. Moreover, while not illustrated, it should be appreciated that the arm 78 also includes an arcuate notch extending proximally from the distal end 74 and positioned opposite the arcuate notch 108. As indicated above, the second member 18 is positionable over the first member 16. In this arrangement, the first and second arms 28, 30 of the first member 16 are positioned in the elongate passage 82 between the transition portion 100 and the linear surface 106 such that the elongated tabs 46, 56 are generally positioned opposite of and extend toward the transition portion 100. While not illustrated in FIGS. 5-6A, it should be appreciated that a collar member 110 may be coupled with the proximal end 72 of the elongate body 70 of the second member 18, as illustrated in FIGS. 1 and 7. It should also be appreciated that forms in which the collar member 1 10 is absent from the anchor extender 10 are contemplated. The collar member 110 is rotatably coupled with the elongate body 70 such that it can be rotated relative to the second member 18. Moreover, the collar member 1 10 includes an inwardly extending pin 1 12 engageable within the groove 41 on the first member 16 when the second member 18 is positioned over the first member 16. In this arrangement, the second member 18 can be moved distally from a first position relative to the first member 16 where the pin 1 12 is positioned in the proximal portion 41a of the groove 41 and the collar member 110 abuts the distal facing surface 40 by rotating the collar member 1 10 relative to the second member 18. As the collar member 1 10 is rotated, the pin 112 is distally guided into the distal portion 41b of the groove 41, which in turn results in distal displacement of the second member 18 to a second position relative to the first member 16. Once the second member 18 is in the second position relative to the first member 16, the collar member 1 10 can be rotated in an opposite direction such that the pin 1 12 is proximally guided into the proximal portion 41a of the groove 41, and the second member 18 is proximally returned to its first position relative to the first member 16. In another non-illustrated form, the collar member 1 10 includes internal threads configured to engage with external threads on the first member 16 such that the interaction between the internal and external threads results in proximal and distal displacement of the second member 18 relative to the first member 16 as the collar member 110 is rotated in opposite directions relative to the first member 16.
Referring collectively to FIGS. 8-9A and 1 1-12A, further details regarding engagement of the anchor extender 10 with the anchor 210 will be provided. More specifically, when the second member 18 is positioned in its first or proximal position relative to the first member 16, the distal end 14 of the anchor extender 10 may be positioned adjacent to the receiver member 212 such that the anchor extender 10 is initially engaged therewith. More particularly, the anchor extender 10 is positionable relative to the anchor 210 such that a portion of the receiver member 212 is positioned in the elongate passage 82. As illustrated in FIG. 9A, in this arrangement, a proximal portion of the branch 222 is positioned in the first portion 96 of the elongate passage 82 such that the proximal end 218 of the receiver member 212 is positioned in abutment against the transition portion 100 and the second member 18 engages the branch 222 on the second side 230 of the receiver member 212. The branch 222 is further positioned between the first arm 28 and the second member 18. Additionally, the arm 28 is positioned adjacent to the first side 228 of the receiver member 212 such that the elongate tab 46 faces the lateral receptacle 234 of the branch 222. However, as illustrated in FIG. 9A, a gap G is positioned between the elongate tab 46 and the first side 228 of the receiver member 212 along the branch 222. A portion of the branch 222 is also received in the recess 48 such that a portion of the side surface 52 extends along an external surface of the branch 222 between the opposite first and second sides 228, 230 of the receiver member 212.
While not illustrated in FIG. 9A, it should be appreciated that a portion of the branch 224 of the receiver member 212 is positioned in the elongate passage 82 and relative to the arm 30 and the second member 18 in the same manner as discussed above in connection with the branch 222. More specifically, a proximal portion of the branch 224 is positioned in the first portion 96 of the elongate passage 82 such that the proximal end 218 of the receiver member 212 is positioned in abutment against the transition portion 100, and the second member 18 engages the branch 224 on the second side 230 of the receiver member 212. The branch 224 is further positioned between the second arm 30 and the second member 18. Additionally, the arm 30 is positioned adjacent the first side 228 of the receiver member 212 such that the elongate tab 56 faces the lateral receptacle (not shown) of the branch 224. However, a gap will also extend between the elongate tab 56 and the first side 228 of the receiver member 212 along the branch 224. A portion of the branch 224 is also received in the recess 58 such that a portion of the side surface 62 extends along an external surface of the branch 224 between the opposite first and second sides 228, 230 of the receiver member 212.
In view of the foregoing, it should be appreciated that the anchor extender 10 can be initially or provisionally engaged with the anchor 210 such that a portion of the branches 222, 224 on the first side 228 of the receiver member 212 are positioned in the socket 66 defined by the arms 28, 30, and a portion of the branches 222, 224 on the second side 230 of the receiver member 212 are positioned in the elongate passage 82.
Additionally, as illustrated in FIG. 9A, the longitudinal axis L of the anchor extender 10 is laterally offset from the central axis 216 of the receiver member 212 when the anchor extender 10 is initially engaged with the anchor 210 in this manner. It should be appreciated that in this arrangement, the anchor extender 10 is readily disengageable from the anchor 210 as it is axially moved in a proximal direction relative to the anchor 210. However, the axial positioning of the anchor extender 10 relative to the anchor 210 may also be fixed upon further engagement of the anchor extender 10 with the anchor 210, further details of which will be provided below in connection with FIGS. 11-12A.
The anchor extender 10 can be further engaged with the anchor 210 by distally displacing the second member 18 relative to the first member 16. As the second member 18 is distally displaced, the transition portion 100 of the elongate passage 82 engages with the proximal end 218 of the receiver member 212 on the branches 222, 224 and guides the proximal end 218 into the second portion 98 of the elongate passage 82. The second member 218 is laterally displaced relative to the anchor 210 as the proximal end 218 is guided into the second portion 98 of the elongate passage 82, which in turn displaces the arms 28, 30 toward the first side 228 of the receiver member 212 such that the elongate tabs 46, 56 are moved into engagement with the lateral receptacles on the branches 222, 224 on the first side 228 of the receiver member 212. Once the elongated tabs are engaged with the branches 222, 224, the longitudinal axis L of the anchor extender 10 and the central axis 216 of the receiver member 212 are aligned with one another, as illustrated in FIG. 12A. In this arrangement, the anchor extender 10 is engaged with the anchor 210 such that it is not readily disengageable from the anchor 210 upon proximal movement of the anchor extender 10. Rather, in order to disengage the anchor extender 10 from the anchor 210 in this arrangement, the second member 18 is proximally displaced relative to the first member 16 to facilitate disengagement of the elongated tabs 46, 56 from the lateral receptacles of the branches 222, 224. While not previously discussed, it should be appreciated that while FIG. 12A illustrates engagement of the anchor extender 210 with the branch 222, engagement of the anchor extender 10 with the branch 224 will occur in the same manner.
In the arrangement illustrated in FIG. 12 A, the distal ends 24, 74 of the first and second members 16, 18 are generally aligned with one another in a proximal/distal direction, and the elongate tabs 46, 56 are positioned in the elongate passage 82 opposite of and facing toward the transition portion 100 of the elongate passage 82. Moreover, the branch 222 is engaged on the first side 228 by the arm 28 of the first member 16 and on the second side 230 by the arm 78 of the second member 18, and the branch 224 is engaged on the first side 228 by the arm 30 of the first member 16 and on the second side 230 by the arm 80 of the second member 18. As illustrated in FIGS. 1, 8, and 1 1, the channel 226 is unobstructed by the first and second members 16, 18, and the slots 34, 86 of the first and second members 16, 18, respectively, align with one another and provide access to the channel 226. Similarly, the connecting element 240 may be guided along the slots 34, 86 into the channel 226. Further, as illustrated in FIG. 12, the elongate passages 32, 82 cooperate with one another to provide access through the anchor extender 10 to the channel 226 to facilitate engagement of a set screw with the internal threading 232 to lock the connecting element 240 in the channel 226.
Without limitation to any particular application, it is contemplated that the anchor extender 10 can be engaged with the anchor 210 to provide assistance in performing a variety of aspects associated with a surgical procedure, non-limiting examples of which include guiding and/or reducing the connecting element 240 into the channel 226 and/or facilitating rotation or manipulation of the anchor 210 to facilitate alignment of the channel 226 with the connecting element 240. Referring more particularly to FIG. 1, in the illustrated form, the reduction instrumentation 310 is coupled to the anchor extender 10 and configured to facilitate reduction of the connecting element 240 into the channel 226. While not illustrated in FIG. 1, it should be appreciated that the anchor extender 10 can be engaged with the anchor 210 in the manner discussed above in connection with FIG. 12A while the connecting element 240 is reduced into the channel 226.
The reduction instrumentation 310 generally includes a collar portion 312 positioned about the first member 16 and to which a release member 314 is pivotably coupled. The release member 314 generally includes an engaging portion (not shown) positioned in the elongate passage 32 of the first member 16 through the opening 36 and configured to engage with external threading of a reduction member 316. The reduction member 316 is rotatably coupled with a connecting element engaging portion 318 and, when engaged with the release member 314, distally advances or proximally withdraws the engaging portion 318 upon rotation in opposite directions relative to the anchor extender 10. The release member 314 is also generally configured to facilitate distal movement of the reduction member 316 relative to the anchor extender 10 without rotation of the reduction member 316 when it is engaged with the release member 314, and to prevent proximal movement of the reduction member 316 relative to the anchor extender 10 without rotation of the reduction member 316 when it is engaged with the release member 314. However, the release member 314 may also be displaced from engagement with the reduction member 316, in which case the reduction member 316 may be readily displaced relative to the anchor inserter 10 in both proximal and distal directions without rotation.
In operation, the reduction member 316 can be distally advanced, either by rotation, pushing without rotation, or a combination of the two, in order to seat the connecting element 240 in the channel 226. Once the connecting element 240 is seated in the channel 226, a set screw and related driver can be advanced through a hollow interior 320 of the reduction member 316 and engaged with the anchor 210 in order to secure the connecting element 240 in the channel 226. Once the connecting element 240 has been properly secured in the channel 226, the anchor extender 10 can be disengaged from the anchor 210 and removed, along with the reduction instrumentation 310, from the surgical site adjacent the anchor 210.
In addition to or in lieu of the foregoing, one or more instruments configured for adjusting, rotating or manipulating the position of the anchor 210 or the bone or bony tissue to which it is engaged may also be coupled with the anchor extender 10. Non- limiting examples of such instruments include those useful in derotating, compressing, distracting or otherwise adjusting the relative positioning of bones or bony tissues.
Further, while not previously discussed, it should be appreciated that the anchor extender 10 can be engaged with the anchor 210 either before or after it has been engaged in bone or bony tissue. Similarly, in one form, the anchor extender 10 can be used during placement and engagement of the anchor 210 in the respective bone or bony tissue.
As indicated above, in one form, the anchor extender 10 can be used in connection with surgical procedures for stabilizing one or more segments of the spinal column.
However, it should be appreciated that the use of the anchor extender 10 in other surgical procedures is also contemplated, including those performed in anatomical locations other than the spinal column. Additionally, the methods, techniques, assemblies, devices, apparatuses, systems and instrumentation described herein may also be used in surgical procedures involving animals, or in demonstrations for training, education, marketing, sales and/or advertising purposes. The methods, techniques, assemblies, devices, apparatuses, systems and instrumentation described herein may also be used on or in connection with a non-living subject such as a cadaver, training aid or model, or in connection with testing of surgical systems, surgical procedures, orthopedic devices and/or apparatus. Any theory, mechanism of operation, proof, or finding stated herein is meant to further enhance understanding of the present application and is not intended to make the present application in any way dependent upon such theory, mechanism of operation, proof, or finding. It should be understood that while the use of the word preferable, preferably or preferred in the description above indicates that the feature so described may be more desirable, it nonetheless may not be necessary and embodiments lacking the same may be contemplated as within the scope of the application, that scope being defined by the claims that follow. In reading the claims it is intended that when words such as "a," "an," "at least one," "at least a portion" are used there is no intention to limit the claim to only one item unless specifically stated to the contrary in the claim. Further, when the language "at least a portion" and/or "a portion" is used the item may include a portion and/or the entire item unless specifically stated to the contrary.
While the application has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the selected embodiments have been shown and described and that all changes, modifications and equivalents that come within the spirit of the application as defined herein or by any of the following claims are desired to be protected.

Claims

1. An apparatus, comprising:
an anchor including a bone engaging portion and a receiver member, said receiver member having a pair of oppositely positioned branches and a receiving channel positioned between said branches, said receiving channel extending between opposite first and second sides of said receiver member; and
an anchor extender engageable with said anchor, said anchor extender including: a first member having an elongate body extending between a proximal end and an opposite distal end, said elongate body having oppositely positioned first and second arms each including an engaging portion structured to engage a respective one of said branches on said first side of said receiver member;
a second member positioned about said first member, said second member being movable relative to said first member between a first position and a second position and including a distal portion structured to engage with said branches on said second side of said receiver member; and
wherein distal movement of said second member relative to said first member from said first position to said second position moves said engaging portions of said first and second arms into engagement with said branches on said first side of said receiver member and said distal portion of said second member along said branches on said second side of said receiver member.
2. The apparatus of claim 1, wherein said distal portion of said second member includes a distally opening receptacle configured to receive a portion of said branches of said receiver member, said receptacle including a first portion positioned distally of a second portion, said second portion including a reduced cross-sectional dimension relative to said first portion.
3. The apparatus of claim 2, wherein said distal portion of said second member further includes a ramped surface extending between said first and second portions of said receptacle, said ramped surface being structured to engage with and position said portion of said branches from said first portion to said second portion of said receptacle as said second member is moved distally to said second position.
4. The apparatus of claim 3, wherein said branches of said receiver member are positioned between said ramped surface and said first and second arms of said first member when said anchor extender is engaged with said anchor.
5. The apparatus of claim 3, wherein each of said engagement portions of said first and second arms is engaged with said respective one of said branches on said first side when said portion of said branches is positioned in said second portion of said receptacle.
6. The apparatus of claim 3, wherein said first and second arms of said first member are positioned in said receptacle opposite of said ramped surface.
7. The apparatus of claim 1, wherein said first member extends along a longitudinal axis between said proximal and distal ends and each of said engaging portions of said first and second arms includes an elongated tab, each of said elongated tabs being offset from said longitudinal axis and extending substantially parallel to one another from said first and second arms.
8. The apparatus of claim 7, wherein each of said elongated tabs is positioned in a corresponding recess in said first and second arms, said recesses cooperating to define a socket for receiving a portion of said branches on said first side of said receiver member when said second member is in said first and second positions.
9. The apparatus of claim 1, wherein said first member includes a first elongated slot positioned between said first and second arms, said second member includes a second elongated slot, and said first and second elongated slots are aligned with one another and define a passage extending substantially parallel to said receiving channel.
10. The apparatus of claim 1, wherein said anchor extender includes a collar member rotatably coupled with said second member, said collar member including an alignment pin structured to engage with a groove on said first member such that rotation of said collar member relative to said second member translates said second member relative to said first member.
11. The apparatus of claim 10, wherein said first member further includes a proximal portion from which said first and second arms extend, said proximal portion including an elongate hollow interior and a distal facing surface extending thereabout, said distal facing surface limiting proximal movement of said second member relative to said first member.
12. The apparatus of claim 1, wherein said first member includes a pair of longitudinal tongues positioned on said first and second arms, said tongues being configured to engage a respective one of oppositely positioned longitudinal grooves formed along an inner surface of said second member.
13. The apparatus of claim 1, wherein said anchor extender is coupled with said anchor in an axially fixed relationship when said second member is in said second position.
PCT/US2012/027970 2011-05-05 2012-03-07 Anchor extender assemblies and methods for using the same WO2012150999A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/101,854 2011-05-05
US13/101,854 US8556904B2 (en) 2011-05-05 2011-05-05 Anchors extender assemblies and methods for using

Publications (1)

Publication Number Publication Date
WO2012150999A1 true WO2012150999A1 (en) 2012-11-08

Family

ID=47090762

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/027970 WO2012150999A1 (en) 2011-05-05 2012-03-07 Anchor extender assemblies and methods for using the same

Country Status (2)

Country Link
US (1) US8556904B2 (en)
WO (1) WO2012150999A1 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9750548B2 (en) * 2011-10-11 2017-09-05 Globus Medical, Inc. Rod-reducing apparatus and associated methods
US9295488B2 (en) 2012-08-09 2016-03-29 Wilson T. Asfora Joint fusion
US9918752B2 (en) * 2012-11-29 2018-03-20 Warsaw Orthopedic, Inc. Spinal implant system and method
US9486256B1 (en) 2013-03-15 2016-11-08 Nuvasive, Inc. Rod reduction assemblies and related methods
US10136927B1 (en) 2013-03-15 2018-11-27 Nuvasive, Inc. Rod reduction assemblies and related methods
US9655659B2 (en) * 2013-04-20 2017-05-23 Degen Medical, Inc. Anchor tower
US9486257B2 (en) 2014-08-07 2016-11-08 Jeffrey Scott Smith Rod reduction tool and method to assist in the passage of a connecting rod between pedicle screws
DE102016106608A1 (en) * 2016-04-11 2017-10-12 Aesculap Ag Instrument for guiding a rod into an implant receptacle
US10085778B2 (en) * 2016-03-04 2018-10-02 Spinal Elements, Inc. Rod reducer instrument for spinal surgery
DE102016224503B3 (en) 2016-12-08 2018-05-24 Premiere Medical Gmbh Surgical reduction instrument
US10610269B2 (en) 2017-09-05 2020-04-07 Medos International Sarl Modular surgical instruments and related methods
US11730522B2 (en) * 2017-10-20 2023-08-22 Spine Wave, Inc. Threaded spinal rod reducer
US20190117280A1 (en) * 2017-10-20 2019-04-25 Spine Wave, Inc. Threaded spinal rod reducer
US10966762B2 (en) 2017-12-15 2021-04-06 Medos International Sarl Unilateral implant holders and related methods
US10918424B2 (en) * 2018-03-12 2021-02-16 Zimmer Biomet Spine, Inc. Rod reducer ratchet lock-out mechanism
US11051861B2 (en) 2018-06-13 2021-07-06 Nuvasive, Inc. Rod reduction assemblies and related methods
US10959859B2 (en) * 2018-07-25 2021-03-30 Warsaw Orthopedic, Inc. Spinal implant system and method
USD1004774S1 (en) 2019-03-21 2023-11-14 Medos International Sarl Kerrison rod reducer
US11291482B2 (en) 2019-03-21 2022-04-05 Medos International Sarl Rod reducers and related methods
US11291481B2 (en) 2019-03-21 2022-04-05 Medos International Sarl Rod reducers and related methods
US11617602B2 (en) * 2020-04-16 2023-04-04 Medtronic, Inc. Systems, methods of use and surgical instruments employing a secure slide lock to fasten a head
US11439444B1 (en) * 2021-07-22 2022-09-13 Globus Medical, Inc. Screw tower and rod reduction tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070129731A1 (en) * 2003-12-16 2007-06-07 Christopher Sicvol Percutaneous Access Devices And Bone Anchor Assemblies
US20070162009A1 (en) * 2005-03-04 2007-07-12 Chao Nam T Instruments and methods for manipulating vertebra
US20080077135A1 (en) * 2006-09-26 2008-03-27 Depuy Spine, Inc. Minimally invasive bone anchor extensions
US20080228228A1 (en) * 2006-10-06 2008-09-18 Zimmer Spine, Inc. Spinal stabilization system with flexible guides

Family Cites Families (102)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409968A (en) 1980-02-04 1983-10-18 Drummond Denis S Method and apparatus for engaging a hook assembly to a spinal column
US4411259A (en) 1980-02-04 1983-10-25 Drummond Denis S Apparatus for engaging a hook assembly to a spinal column
US4877020A (en) 1984-11-30 1989-10-31 Vich Jose M O Apparatus for bone graft
US4963144A (en) 1989-03-17 1990-10-16 Huene Donald R Bone screw fixation assembly, bone screw therefor and method of fixation
US5020519A (en) 1990-12-07 1991-06-04 Zimmer, Inc. Sagittal approximator
USD346217S (en) 1992-07-13 1994-04-19 Acromed Corporation Combined hook holder and rod mover for spinal surgery
US5281223A (en) 1992-09-21 1994-01-25 Ray R Charles Tool and method for derotating scoliotic spine
US5364397A (en) 1993-06-01 1994-11-15 Zimmer, Inc. Spinal coupler seater with dual jaws and an independent plunger
US5616143A (en) 1995-02-06 1997-04-01 Schlapfer; Johannes F. Surgical forceps
US5941885A (en) 1996-10-08 1999-08-24 Jackson; Roger P. Tools for use in installing osteosynthesis apparatus utilizing set screw with break-off head
US5720751A (en) 1996-11-27 1998-02-24 Jackson; Roger P. Tools for use in seating spinal rods in open ended implants
US5910141A (en) 1997-02-12 1999-06-08 Sdgi Holdings, Inc. Rod introduction apparatus
DE29806563U1 (en) 1998-04-09 1998-06-18 Howmedica Gmbh Pedicle screw and assembly aid for it
US6123707A (en) 1999-01-13 2000-09-26 Spinal Concepts, Inc. Reduction instrument
US6605088B1 (en) 2000-03-15 2003-08-12 Richard A. St. Onge Bone setting apparatus and method
JP3936118B2 (en) 2000-03-28 2007-06-27 昭和医科工業株式会社 Rod gripper
US6379356B1 (en) 2000-04-26 2002-04-30 Roger P. Jackson Closure for open ended medical implant
US6743231B1 (en) 2000-10-02 2004-06-01 Sulzer Spine-Tech Inc. Temporary spinal fixation apparatuses and methods
FR2827758B1 (en) 2001-07-25 2004-07-16 Spinevision Sa ANCILLARY FOR A SPINAL OSTEOSYNTHESIS SYSTEM
US6746449B2 (en) 2001-09-12 2004-06-08 Spinal Concepts, Inc. Spinal rod translation instrument
FR2830433B1 (en) 2001-10-04 2005-07-01 Stryker Spine ASSEMBLY FOR OSTEOSYNTHESIS OF THE SPINACH COMPRISING AN ANCHORING MEMBER HEAD AND A TOOL FOR HEAD FIXING
US6660006B2 (en) 2002-04-17 2003-12-09 Stryker Spine Rod persuader
US7278995B2 (en) 2002-06-04 2007-10-09 Howmedica Osteonics Corp. Apparatus for securing a spinal rod system
US7004947B2 (en) 2002-06-24 2006-02-28 Endius Incorporated Surgical instrument for moving vertebrae
US6730089B2 (en) 2002-08-26 2004-05-04 Roger P. Jackson Nested closure plug and set screw with break-off heads
US6648888B1 (en) 2002-09-06 2003-11-18 Endius Incorporated Surgical instrument for moving a vertebra
US20060095035A1 (en) 2004-11-03 2006-05-04 Jones Robert J Instruments and methods for reduction of vertebral bodies
US7887539B2 (en) 2003-01-24 2011-02-15 Depuy Spine, Inc. Spinal rod approximators
US7988698B2 (en) 2003-01-28 2011-08-02 Depuy Spine, Inc. Spinal rod approximator
US7621918B2 (en) 2004-11-23 2009-11-24 Jackson Roger P Spinal fixation tool set and method
US7461574B2 (en) 2003-04-28 2008-12-09 Biomet Microfixation, Llc Multiple screw delivery apparatus
US7156849B2 (en) 2003-06-16 2007-01-02 Depuy Spine, Inc. Rod reduction nut and driver tool
US20040267275A1 (en) 2003-06-26 2004-12-30 Cournoyer John R. Spinal implant holder and rod reduction systems and methods
WO2005006948A2 (en) 2003-07-03 2005-01-27 Hfsc Company Top loading spinal fixation device and instruments for loading and handling the same
US20050059969A1 (en) 2003-09-17 2005-03-17 Depuy Acromed, Inc. Rod approximator
US7955355B2 (en) * 2003-09-24 2011-06-07 Stryker Spine Methods and devices for improving percutaneous access in minimally invasive surgeries
JP4624365B2 (en) 2003-12-17 2011-02-02 デピュイ・スパイン・インコーポレイテッド Apparatus and method for use in bone anchor engagement and spinal rod placement
US7842044B2 (en) 2003-12-17 2010-11-30 Depuy Spine, Inc. Instruments and methods for bone anchor engagement and spinal rod reduction
FR2863861B1 (en) 2003-12-23 2006-03-17 Eurosurgical SURGICAL INSTRUMENT OF THE TYPE OF CLINKER FOR SPINAL IMPLANT.
US8152810B2 (en) 2004-11-23 2012-04-10 Jackson Roger P Spinal fixation tool set and method
WO2005092218A1 (en) 2004-02-27 2005-10-06 Jackson Roger P Orthopedic implant rod reduction tool set and method
US9050148B2 (en) 2004-02-27 2015-06-09 Roger P. Jackson Spinal fixation tool attachment structure
US7160300B2 (en) 2004-02-27 2007-01-09 Jackson Roger P Orthopedic implant rod reduction tool set and method
US7470279B2 (en) 2004-02-27 2008-12-30 Jackson Roger P Orthopedic implant rod reduction tool set and method
JP4213609B2 (en) * 2004-03-09 2009-01-21 昭和医科工業株式会社 Rod fixing aid
US7491207B2 (en) 2004-04-12 2009-02-17 Synthes Usa, Llc Rod persuader
CA2571467A1 (en) 2004-07-06 2006-01-06 Synthes (U.S.A.) Spinal rod insertion instrument
US7572281B2 (en) 2004-08-06 2009-08-11 Depuy Spine, Inc. Instrument for guiding a rod into an implant in a spinal fixation system
US7465306B2 (en) * 2004-08-13 2008-12-16 Warsaw Orthopedic, Inc. System and method for positioning a connecting member adjacent the spinal column in minimally invasive procedures
US7651502B2 (en) 2004-09-24 2010-01-26 Jackson Roger P Spinal fixation tool set and method for rod reduction and fastener insertion
US7666189B2 (en) * 2004-09-29 2010-02-23 Synthes Usa, Llc Less invasive surgical system and methods
US20060089651A1 (en) 2004-10-26 2006-04-27 Trudeau Jeffrey L Apparatus and method for anchoring a surgical rod
US20080154277A1 (en) 2004-10-26 2008-06-26 Scott Machalk Tool apparatus for locking a spinal rod in an anchoring device therefor
US20060111730A1 (en) 2004-11-23 2006-05-25 Medical Innovators, Inc. Deformity reduction instrument and method
US7909834B2 (en) 2004-12-15 2011-03-22 Depuy Spine, Inc. Self retaining set screw inserter
US7914536B2 (en) 2005-03-11 2011-03-29 Aesculap Ag Bone repair device and method
US7758617B2 (en) 2005-04-27 2010-07-20 Globus Medical, Inc. Percutaneous vertebral stabilization system
US7608081B2 (en) 2005-05-23 2009-10-27 Custom Spine, Inc. Rod reducer
US20060293692A1 (en) 2005-06-02 2006-12-28 Whipple Dale E Instruments and methods for manipulating a spinal fixation element
US7749233B2 (en) * 2005-06-08 2010-07-06 Innovative Spine, Llc Sleeve assembly for spinal stabilization system and methods of use
US8100916B2 (en) 2005-07-21 2012-01-24 Depuy Spine, Inc. Instrument for inserting, adjusting and removing a surgical implant
US7909830B2 (en) 2005-08-25 2011-03-22 Synthes Usa, Llc Methods of spinal fixation and instrumentation
US7771430B2 (en) 2005-09-29 2010-08-10 K2M, Inc. Single action anti-torque rod reducer
US20070161998A1 (en) 2005-10-28 2007-07-12 Dale Whipple Instruments and Methods For Manipulating A Spinal Rod
US7575581B2 (en) 2005-12-07 2009-08-18 Blackstone Medical, Inc. Device for holding and inserting one or more components of a pedicle screw assembly
EP1981422B1 (en) 2006-02-06 2018-10-24 Stryker European Holdings I, LLC Rod contouring apparatus for percutaneous pedicle screw extension
US8192438B2 (en) 2006-05-18 2012-06-05 Phygen, LLC. Rod reducer
US20080015601A1 (en) 2006-06-14 2008-01-17 Michael Castro Reduction device and method of use
US8663292B2 (en) 2006-08-22 2014-03-04 DePuy Synthes Products, LLC Reduction sleeve
US8979848B2 (en) 2006-09-25 2015-03-17 Stryker Spine Force limiting persuader-reducer
US8096996B2 (en) * 2007-03-20 2012-01-17 Exactech, Inc. Rod reducer
US8052720B2 (en) * 2006-11-09 2011-11-08 Zimmer Spine, Inc. Minimally invasive pedicle screw access system and associated method
US8211110B1 (en) * 2006-11-10 2012-07-03 Lanx, Inc. Minimally invasive tool to facilitate implanting a pedicle screw and housing
US7931673B2 (en) * 2006-12-06 2011-04-26 Zimmer Spine, Inc. Minimally invasive vertebral anchor access system and associated method
AU2007332794C1 (en) 2006-12-08 2012-01-12 Roger P. Jackson Tool system for dynamic spinal implants
US20080228233A1 (en) 2007-02-12 2008-09-18 Jeffrey Hoffman Instrument for manipulating spinal implant system
US20080195155A1 (en) 2007-02-12 2008-08-14 Jeffrey Hoffman Locking instrument for implantable fixation device
US8308774B2 (en) 2007-02-14 2012-11-13 Pioneer Surgical Technology, Inc. Spinal rod reducer and cap insertion apparatus
US20080234765A1 (en) 2007-03-13 2008-09-25 Depuy Spine, Inc. Rod reduction methods and devices
US8172847B2 (en) 2007-03-29 2012-05-08 Depuy Spine, Inc. In-line rod reduction device and methods
US8961523B2 (en) 2007-07-13 2015-02-24 K2M, Inc. Rod reduction device and method of use
US7887541B2 (en) 2007-07-26 2011-02-15 Depuy Spine, Inc. Spinal rod reduction instruments and methods for use
US8512343B2 (en) 2007-08-31 2013-08-20 DePuy Synthes Products, LLC Methods and instruments for approximating misaligned vertebra
US8790348B2 (en) 2007-09-28 2014-07-29 Depuy Spine, Inc. Dual pivot instrument for reduction of a fixation element and method of use
EP2222241B1 (en) 2007-10-23 2016-09-14 Alphatec Spine, Inc. Systems for spinal fixation
US8540718B2 (en) 2007-10-23 2013-09-24 Aesculap Implant Systems, Llc Rod persuader
WO2009076239A2 (en) 2007-12-06 2009-06-18 Vertiflex, Inc. Spondylolisthesis reduction system and method
US8608746B2 (en) 2008-03-10 2013-12-17 DePuy Synthes Products, LLC Derotation instrument with reduction functionality
US20090281582A1 (en) 2008-05-08 2009-11-12 Raul Villa Instrument for the reduction of a rod into position in a pedicle screw
EP2296569B1 (en) 2008-06-11 2014-04-09 K2M, Inc. Rod reduction device
JP5543964B2 (en) 2008-06-11 2014-07-09 ケー2エム, インコーポレイテッド Rod reduction device
US9066763B2 (en) 2008-07-31 2015-06-30 Zimmer Spine, Inc. Surgical instrument with integrated reduction and distraction mechanisms
US20100036434A1 (en) 2008-08-05 2010-02-11 Abbott Spine Inc. Rescue reduction bone anchor
WO2010045383A2 (en) 2008-10-14 2010-04-22 Trinity Orthopedics, Llc Insertion and reduction tool for pedicle screw assembly
EP2742884B1 (en) 2008-10-23 2018-10-31 Alphatec Spine, Inc. Systems for spinal fixation
US8864767B2 (en) 2008-11-10 2014-10-21 Spinal Elements, Inc. Rod reducer instrument for spinal surgery
US8128629B2 (en) 2009-01-22 2012-03-06 Ebi, Llc Rod coercer
US8137357B2 (en) 2009-01-22 2012-03-20 Ebi, Llc Rod coercer
US8211111B2 (en) 2009-03-04 2012-07-03 Aesculap Implant Systems, Llc Spinal rod manipulator instrument
US8900238B2 (en) 2009-03-27 2014-12-02 Globus Medical, Inc. Devices and methods for inserting a vertebral fixation member
US9161787B2 (en) 2009-04-23 2015-10-20 The Johns Hopkins University Vertebral body reduction instrument and methods related thereto
US8206394B2 (en) 2009-05-13 2012-06-26 Depuy Spine, Inc. Torque limited instrument for manipulating a spinal rod relative to a bone anchor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070129731A1 (en) * 2003-12-16 2007-06-07 Christopher Sicvol Percutaneous Access Devices And Bone Anchor Assemblies
US20070162009A1 (en) * 2005-03-04 2007-07-12 Chao Nam T Instruments and methods for manipulating vertebra
US20080077135A1 (en) * 2006-09-26 2008-03-27 Depuy Spine, Inc. Minimally invasive bone anchor extensions
US20080228228A1 (en) * 2006-10-06 2008-09-18 Zimmer Spine, Inc. Spinal stabilization system with flexible guides

Also Published As

Publication number Publication date
US8556904B2 (en) 2013-10-15
US20120283786A1 (en) 2012-11-08

Similar Documents

Publication Publication Date Title
US8556904B2 (en) Anchors extender assemblies and methods for using
US8323286B2 (en) Systems and methods for minimally invasive surgical procedures
US7520879B2 (en) Surgical instruments and techniques for percutaneous placement of spinal stabilization elements
US8491590B2 (en) System and method of manipulating spinal constructs
US20190374264A1 (en) Methods and devices for spinal fixation element placement
US8460301B2 (en) Systems and methods for minimally invasive stabilization of bony structures
US8685066B2 (en) Devices and methods for positioning a spinal fixation element
US8246624B2 (en) Spinal rod insertion tool and method
US7922725B2 (en) Method and associated instrumentation for installation of spinal dynamic stabilization system
US20130066385A1 (en) Connecting element reduction instrument and methods for using same
US8403963B2 (en) Method and apparatus for spinal fixation using minimally invasive surgical techniques
US20120277808A1 (en) Instrument and method for reducing elongate connecting elements
US20110166606A1 (en) Reduction tool
US20190269440A1 (en) Mis cross-connector
US11446043B2 (en) MIS cross-connector
US8690878B2 (en) Flexible anchor extenders
US20120303055A1 (en) Percutaneous rod delivery techniques and systems

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12779760

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12779760

Country of ref document: EP

Kind code of ref document: A1