CA1224990A - Apparatus for straightening spinal columns - Google Patents
Apparatus for straightening spinal columnsInfo
- Publication number
- CA1224990A CA1224990A CA000459110A CA459110A CA1224990A CA 1224990 A CA1224990 A CA 1224990A CA 000459110 A CA000459110 A CA 000459110A CA 459110 A CA459110 A CA 459110A CA 1224990 A CA1224990 A CA 1224990A
- Authority
- CA
- Canada
- Prior art keywords
- vertebra
- plate
- force transmitting
- transmitting member
- vertebrae
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7059—Cortical plates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
- A61B17/7007—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
Abstract
Abstract of the Disclosure An improved apparatus is provided to reduce the extent of displacement between adjacent vertebrae in a person's spinal column and to subsequently maintain the vertebrae in a reduced displacement relationship. When the apparatus is to be installed, holes are formed in the displaced vertebra and in vertebrae on opposite sides of the displaced vertebra. Force transmitting members are mounted in the holes in the vertebrae. A spinal plate is then positioned on the spinal column with the force transmitting members extending outwardly through slots in the spinal plate.
Nuts are tightened on the force transmitting members connected with vertebrae on opposite sides of the displaced vertebra to anchor the spinal plate in place, A nut on the force transmitting member connected with the displaced vertebra is then tightened to pull the displaced vertebra to a desired position. In one embodiment of the invention, the force transmitting member has a relatively large diameter helix which engages a side wall of the hole in the displaced vertebra. In another embodiment of the invention, an insert is positioned in a hole in the displaced vertebra and expanded by the force transmitting member to securely grip the vertebra.
Nuts are tightened on the force transmitting members connected with vertebrae on opposite sides of the displaced vertebra to anchor the spinal plate in place, A nut on the force transmitting member connected with the displaced vertebra is then tightened to pull the displaced vertebra to a desired position. In one embodiment of the invention, the force transmitting member has a relatively large diameter helix which engages a side wall of the hole in the displaced vertebra. In another embodiment of the invention, an insert is positioned in a hole in the displaced vertebra and expanded by the force transmitting member to securely grip the vertebra.
Description
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APPARATUS FOR STRAIGHTENING SPINAL C L_MNS
Background of the Invention The present invention relates to a new and improved apparatus for straightening a spinal column of a human by reducing the extent of displacement between adjacent vertebrae and maintaining the vertebrae in a reauced displacement relationship.
An apparatus for use in spinal fixation is disclosed in British Patent No. 780,652. The apparatus disclosed in this pa çnt includes a pair of rigid plates which engage opposite sides of spinous processes projecting from vertebrae. Bolts extend through slots formed in the rigid plates and through holes formed in the spinous processes.
The bolts are rotated rel~tive to stationary nuts to press the plates against opposi-te sides of the spinous processes.
An article entitled "Rhamatisme Vertebra" by Roy-Camille, Sailliant and Judet discloses the use of a rigid plate to hold vertebrae in a desired relationship - ~k ~2~
with each other. When the plate is to be mounted on a spinal column, accurately located holes are drilled in the vertebrae. Holes in the plate are then positioned in alignment t~ith the vertebrae holes. Scre~s are then twisted into the vertebrae to clamp the plate and vertebrae together.
Summary of the Pre;sent Invention The present invention provides an apparatus which reduces the extent of displacement between adjacent vertebrae by pulling a displaced vertebra into a desired position and maintaining it in the desired positionO When the apparatus is to be installed on a person's spinal column, one force transmitting member is mounted in an opening formed in the displaced vertebra and at least one other force transmitting member is mounted in an opening in an adjacent vertebra. The force transmitting member preferably have a portion which securely locks in part of the bone of the vertebra in which they are mounted and a threaded portion which projects outwardly from the vertebrae. A spinal plate is then positioned so that it extends across the displaced vertebra into abutting engagement with vertebrae on opposite sides of the displaced vertebra.
The spinal plate has a series of openings therein for receiving the threaded portions of the force transmitting members. The openings are elongated s]ots so that the ~2~9~
positioning of the spinal plate and the force transmitting members can vary. This allows the force transmitting members to be positioned on the vertebra where desired and enables the spine plate to be used with difEerent size vertebra and vertebra which are spaced di~ferently.
After the spine plate is located with force transmitting members extending through the slots thereof, the displaced vertebra is pulled into the desired relationship with adjacent vertebrae by tightening a nut on an outwardly projecting end portion of the force transmitting member. Since the force transmitt;ng member was previously connected with the displaced vertebra, tightening of the nut applies little or no torsional force to the displaced vertebra. Therefore7 tightening the nut pulls the displaced vertebra straight outward toward the desired position with a minirnum of twisting of the displaced vertebra. Also~ nuts are threaded onto the threaded portion of the force transmitting member or members in the vertebrae adjacent to the displaced vertebra. As a result, the vertebrae are secured together in a straightened condition by the spine plate.
The spine plate has a series of conical recesses in which the nuts which are also conical rest. The series oE
recesses are located along the slots through which the threaded portion of the force transmitting member extends.
Thus, the ability to locate the force transmitting members as desired in the vertebrae is maintained.
~ .
o Brief Desc~ ion_of the Dra~in~
The foregoing and other objects and features of the present invention will become more apparent ~p~n a consideration of the followlng description taken in connection with the accompanying drawings wherein:
Fig. 1 is a fragmentary dorsal view of a portion of a vertebral or spinal column on which apparatus constructed in accordance with the present invention has been installed to reduce the extent of displacement between adjacent vertebrae;
Fig. 2 is a schematic illustration of the vertebral column of Fig. 1 prior to movement of a displaced vertebrae to a desired position relative to adjacent i vertebrae by the apparatus illustrated in Fig. l;
Fig. 3 is a view, taken generally along the line 3-3 of Fig. 2, further illustrating the vertebral column;
Fig. 4 is a view, generally similar to Fig. 3, of the vertebral column with spinous processes removed from the vertebrae and with holes Eormed in the vertebrae;
Fig. 5 is a view illustrating the manner in which spinal plates are mounted on the vertebrae of Fig. 4 to move a displaced vertebra into a desired position relative to adjacent vertebrae;
Fig. 6 is an enlarged fragmentary illustration depicting the manner in which one end portion of a force transmitting member engages a ver-tebra and the opposite ~2~ 39~
end portion of the force transmitting member engages a nut which presses against a spinal plate;
Fig. 7 is an enlarged schematic illustration depicting the manner in which -the force transmitting member of Fig.
6 is mounted in a hole formed in a displaced vertebra;
Fig. 8 is a schematic illustration depicting the manner in which the-displaced vertebra is moved relative to the adjacent vertebrae to reduce the displacement between the vertebrae;
Fig. 9 is a top plan view of the spinal plate;
Fig. 10 is a se~tional view of the spinal plate taken along the line 10-1~ of Fig. 9;
Fig. 11 is a bottom plan view of the spinal plate, taken generally along the line 11-11 of Fig. 10;
Fig. 12 is a schematic illustration of a second embodiment of the invention in which an insert is mounted in an opening formed in a vertebra;
Fig. 13 is a fragmentary schematic illustration, generally similar to Fig. 8, illustrating the manner in which the extent of displacement between adjacent vertebrae is reduced with the second embodiment of the invention; and Fig. 14 is an enlarged fragmentary sectional view illustrating the relationship between the insert of Fig.
12 and a force transmitting member, the insert being shown in a contracted position prior to being expanded into engagement with the side of a hole formed in a vertebra.
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Descr.iption o~ Specific Preferre~ Embodiments of the Invention _____ General Description ____ A pair of assemblies 20 for reducing the extent of displacement between adjacent vertebrae 22 and maintaining the vertebrae in the reduced displacement relationship are illustrated in Fig. 1 installed on a person's vertebral or spinal column 24. Each of the assembl;es ~0 includes an elongated rigid spinaL plate 30 which is mounted on the vertebrae 22 by a plurality of identical fastener assemblies 32~
The illustrated spinal plates 30 have a length so as to span five adjacent vertebrae 22 (see Fig. 5). A pair of fastener assemblies 32 is provided for each vertebra 22 to connect it with each of the spinal plate 30.
Prior to installation of the assemblies 20, a vertebra 22a occupies a displaced position relative to adjacent vetebrae 22b and 22c (see Figs. 2 and 3). The assemblies 20 are installed to reduce the extent of displacement between the vertebra 22a and the adjacent vertebrae 22b and 22c. Once installed, the assemblies 20 maintain the vertebra 22a in the reduced displacement relationship with the adjacent vertebrae 22b and 22c.
When the assemblies 20 are to be installed, the sharp blunt spinous processes 36 which project from the vertebrae 22 (Figs~ 2 and 3) are removed (Fig. 4). A pair o or series of vert;cally aligned holes 40 (see Fig. 4~ are then drilled in the vertebrae 22. The fastener assemblies 32 are mounted in the holes 40.
The fastener assemblies 32 associated with the vertebrae 22 which are above and below the displaced vertebra 22a are tightened to anchor the spinal plat2s 30 in place bridging the space across the displaced vertebra 22a. The fastener assemblies 32 connected with the displaced vertebrae 22a are then tightened to pull the displaced vertebrae 22a toward the right (as viewed in Fig~ ~). This reduces the extent of displacement between the vertebra 22a and the adjacent vertebrae 22. The fastener assemblies 32 cooperate with the vertebrae 22 and the spinal plates 30 to maintain t'ne displaced vertebra 22a in the reduced displacement position relative to the adjacent vertebrae~
Fastener Assembly - First Embodiment Each of the ident;cal fastener assemblies 32 includes an axially extending stainless steel Eorce transmitting member 44 ~Fig. 6). The force transmitting member 4~ has a mounting end portion 46 ~hich is received in a cylindrical hole 4n in a vertebra 22 and a retaining end portion 48 which engages a nut 50. The force transmitting member 44 extends through an elongated slot 52 formed in the spinal plate 30. Therefore, when the nut 50 is ~- ~22~9~
tightened/ the spinal plate 30 is pressed against the vertebra 22.
The mounting end portion 46 of the force transmitting member 44 is provi.ded ~ith a relatively large diameter helix 56 (F.igs. 6 and 7). When the force transmitting member 44 is pressed axially into a hole 40 in a vertebra and rotated, the helix 56 screws itself into the hole.
The helix 56 has a substantially larger crest diameter than the inside diameter of the hole 40 so that the helix cuts into the cylindrical side surface S8 of t'ne hole 40 ii to firmly mount the force transmitting member 44 in the vertebra 22.
The force transmitting member 50 has a very short cylindrical shank portion 62 (Fig. 6) with an outside diameter correponding to the outside diarneter of a cylindrical stainless blank from which the force transmitting member 44 was formed. In order to provide a solid grip between the helix 56 and vertebra 22, the metal ¦ of the blank was worked to form the helix 56 with a relatively large crest diameter and a relatively small root diameter. This results in the helix having flank surfaces 64 and 66 which project into the bone of the vertebra 22 for a substantial distance to firmly hold the force transmitting member 44 against axial movement relative to the vertebra 22.
The helix 56 is turned into the hole 40, which has a diameter ~hich is only slightly greater than the diameter ~:2~
of the shank 62, by applying torque to wrenc~-ing rlats 70 formed on the retaining end portion 48 of the ~orce transmitting member 44. If desired, a slot or other aperture could be formed to receive a screwdriver rather than having wrenching flats 70.
The retaining end portion 48 of the force transmitting member 40 has a standard external screw thread 74 (Fig. 6) which engages a standard internal thread 76 formed in the nut 50. The nut 50 has wrenching flats 80 which are gripped by a suitable wrench to rotate the nut relative to the external thread 74. A conical leading end portion 82 of the nut 50 moves into abutting engagement with the spinal plate 30 as the nut is .ightened onto the force transmitting member 44.
Installation When the assemblies 20 are to be installed on a vertebral column 24, the spinous processes 36 are removed and the holes 40 are drilled in the vertebrae 22. Force transmitting members 44 are then mounted in the displaced vertebra 22a, the pair of vertebra 22 immediately above I the displaced vertebra 22a, and the pair of vertebra 22 immediately below the displaced vertebra 22a. To mount a force transmitting member 44t it is pressed axially into a hole 40 formed in tha vertebra 22 (see Fig. 7) and twisted by applying torque to the wrenching flats 70. This causes the helix 56 to twist into the hole 40.
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When the force transmittiny memhers 44 have been mounted in the vertebra 22, the force transmitting members extend outwardly from the vertebra in a vertical array. A
spinal plate 30 is then positioned on the vertebral colurnn with the force transitting members 4a extending through slots 52 formed along the longitudinal central axis of the spinal plate 30 (see Fig. 9). The force transmitting member 30 is then pressed into firm abutting engagement ~ith the vertebrae 22 immediately above and belo~ the displaced vertebra 22a by ti~htening the nuts 50 on the outwardly projecting retaining end portions 48 of the force transmitting members 44. This results in the spinal plate 30 being firmly anchored in a position in which it bridges the space across the displaced verte'Dra 22a.
Positioning of the spinal plate 30 is facilitated because the axially extending slots 52 in the spinal plate enables its position to be adjusted to accommodate different size vertebrae 22~ Thus, the axial position of the spinal plate 30 can be adjusted vertically relative to the vertebrae 22. If a single circular hole had been provided in the spinal plate 30 for each of the force transmitting members 44, the force transmitting members 44 would have to be located relative to the vertebrae in positions dictated by the locations of the holes in the spinal plate rather than by the size and shape of the vertebrae Eorming the spinal column.
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Once the spinal plate 30 has been firmly anchored by the fastener assemblies 32 disposed on opposite sides of the displaced vertebra 22a, the fastener assembly 32 connected with the displaced vertebra 22a is tightened.
This causes the displaced vertebra to be pulle~ to the desired position under the influence of axial forces applied to the displaced vertebra by the force transmitting member 44.
To tig'nten the fastener assembly 32, the nut 50 is rotated relative to the external threads 74 on the retaining end portion 48 of the force transmitting member. As the nut 50 is rotated, the wrenching flats 70 (see Fig. 6) are held to prevent the application of twisting or torsional forces to the vertebra 22a. This results in the vertebra 22a being pulled straight rightwardly from the displaced position shown in solid lines in Fig. 8 to the desired position shown in dashed lines. Due to the absence of torsional or twisting forces on the vertebra 22a, the vertebra does not tend to become twisted or cocked relative to the adjacent vertebra 22b and 22c. When the fasteners 32 have been tightened and the displaced vertebra 22a moved to the desired position, the projecting end portions of the force transmitting members 44 are cut off.
In the specific instance illustrated in Fig. 8, the displaced vertebra 22a is pulled into abutting engagement -12 ~2~
with the spi.nal plate 30 by tighten;ng the nut 50 on the force transmitting memher 4~. However, it is contemplated that in certain circumstance.s it may be desirabl.e to pull the displaced vertebra 22a only part way toward the spinal plate 30 so that there is a small space between the spinal plate and the previously displaced vertebra 22a. In addtion, it is contemplated that the spinal plate 30 may cooperate with the vertebra 22b or the vertebra 22c to move either or both of these vertebrae from a displaced position to a desired position along wlth the vertebra ~2a.
Spinal Plate The construction of the spinal plate 30 is illustrated in Figs~ 9-11. The spinal plate 30 includes a pair of parallel longitudin~lly extending beam sections 88 and 90 which are interconnected by a plurality of cross sections g4, 96, 98, 100, 102 and 104. The cross sections 94-104 cooperate with the beam sections 88 and 90 to define the slots 52.
The spinal plate 30 has a bottom side surface 108 (Fig. 11) in which a plurality of grooves 110 are formed.
The grooves 110 tend to prevent sliding of the spinal plate 30 relative to the vertebrae 22. In addition/ the bony material of the vertebrae 22 tends to grow into the grooves 110 to further hold the spine plate 30 against movement relative to the vertebrae 22.
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The slots 52 are provided with a bevelled upper or outer edge portions 114 (Fig. 9) which slopes at the same angle as the conical outer side surface 82 (see Fig. 6) o~
the nut 50. A plurality of scallops or recesses 116 are provided in the bevelled edge portions 114 to engage conical side surfaces 82 of the nut 50. The recesses 11~
hold the nuts 50 against sidewise movement relative to the spinal plate 30. The recesses 116 are defined by surfaces which form a portion of a cone having the same included angle as the side surfaces 82 of the nuts 50.
Fastener Assembly - Second Embodiment In the embodiment of the ;nvention illustrated in Figs. 1-11, the fastener assemblies 32 are provided with force transmitting members 44 having helices 56 which engage the bony material of the vertebrae 22. In the embodiment of the invention illustrated in Figs. 12-14, the fastener assemblies are provided with inserts which re engaged by the force transmitting members and are expanded into gripping engagement with the underside surfaces of the holes formed in the vertebrae. Since the embod;ment of the invention illustrated in Figs. 12-14 is generally similar to the embodiment of the invention illustrated in Figs. 1-11, similar numerals will be utilized to designate similar components.
In the embodiment of the invention shown in Figs.
12-14, each of the fastener assemblies 32 includes an ~, .
~2~
insert 122 which is actuated from the contracted condition of Figs. 12 and ~ to the expanded conditioil of Fig. 13 to firm]y grip the inner side surface 58 of a hole 40 formed in the vertebra 22a. The insert 122 is molded of one piece from a suitable polymeric material, such as polyethylene.
The insert 122 has a cylindrical outer side wall 126 (Fig. 14) from which a plurality of annular ridges 128 extend. The insert 122 has a threaded central opening 132. The opening 132 extends inwardly from an end surface 134 ~Fig. 12) to cam surfaces 136 and 138 fromed on end sections 140 and 142 of the insert. The end sections 140 and 142 are separated by an axially extending slot 144 which extends diametrically across one end of the inser-t 122.
The insert 122 is positioned in the hole 40 by Lorcing the insert axially into the hole while rotating the insert about its central axis. To facilitate insertion of the insert 122 into the hole 40, the insert is provided with wrenching flats 148 at the outer end of the fastener.
Once the insert 122 has been positioned in the hole 40 r an externally threaded force transmitting member 152 is turned into the internally threaded central openiny 132 in the insert. As the force transmitting member 152 moves into the insert, a leading conical end portion 154 of the force transmitting member 152 moves into abutting ~;~2~
engagement with the cam surfaces 136 and 138. Continued rotation of the force transmitting member 152 causes the conical leading end portion 154 of the force transmitting member 152 to separate or cam the end sections 140 and 1~2 apart to expand the fastener (see Fig. 13).
As the end sections 1~0 and 142 are separated by the camming action of the force transmitting member 152 against the cam surfaces 136 and 138, the annular ridges 128 on the end sections 140 and 142 are pressed into the bony material of the vertebra 22. The outer end of the force transmitting member 152 may be provided with wrenching flats to facilitate rotation of the force transmit.ing member 152 relative to the insert 1~.2.
After the insert 122 has been expanded by the force transmitting member 152, a nut 50 (see Fig. 13~ is turned onto the force transmitting member 152. The ridges 128 hold the insert 122 against rotation relative to the vertebra 22a as the nut 50 is rotated. As the nut 50 is rotated, the force transmitting member 152 pulls the verte~ra 22a from the displaced position shown in solid lines in Fig. 13 to a desired position shown in dashed lines in Fig. 13.
Summary The present invention provides an apparatus 20 which reduces the extent of displacement between adjacent ~ . .
~2~9~1) vertebrae 22 by pu:l].iny a displaced vertebra 22a into a desired position (shown in dashed ].ine in Fi~. 8! and maintaining it in the clesired position~ Wnen the apparatus is to be installed on the spinal column 2~ of a person, a force transmitting member 4~ is moun~ed in an opening 40 formed in the displaced vertebra 22a. A spinal plate 30 is then positioned so that it extends across the displaced vertebra 22a into abutting engagement with vertebrae 22b and 22c on opposite sides of the displaced vertebra. The displaced vertebra 22a is then pulled into the desired relationship with te adjacent vertebrae by tightening a nut 50 on an outwardly projecting end portion of the force transmitting member 44. Since the force . transmitting member 4~ was previously connected with the displaced vertebra 22a, tightening of the nut 50 applies little or no torsional froce to the displaced vertebra 22a. There~ore, tightening the nut 50 pulls the displaced vertebra 22a straight outward from the displaced position shown in solid lines in Fig. 8 toward the desired position shown in dashed lines in Fig. 8 with a minimurn of t~7isting of the displaced vertebra 22a.
APPARATUS FOR STRAIGHTENING SPINAL C L_MNS
Background of the Invention The present invention relates to a new and improved apparatus for straightening a spinal column of a human by reducing the extent of displacement between adjacent vertebrae and maintaining the vertebrae in a reauced displacement relationship.
An apparatus for use in spinal fixation is disclosed in British Patent No. 780,652. The apparatus disclosed in this pa çnt includes a pair of rigid plates which engage opposite sides of spinous processes projecting from vertebrae. Bolts extend through slots formed in the rigid plates and through holes formed in the spinous processes.
The bolts are rotated rel~tive to stationary nuts to press the plates against opposi-te sides of the spinous processes.
An article entitled "Rhamatisme Vertebra" by Roy-Camille, Sailliant and Judet discloses the use of a rigid plate to hold vertebrae in a desired relationship - ~k ~2~
with each other. When the plate is to be mounted on a spinal column, accurately located holes are drilled in the vertebrae. Holes in the plate are then positioned in alignment t~ith the vertebrae holes. Scre~s are then twisted into the vertebrae to clamp the plate and vertebrae together.
Summary of the Pre;sent Invention The present invention provides an apparatus which reduces the extent of displacement between adjacent vertebrae by pulling a displaced vertebra into a desired position and maintaining it in the desired positionO When the apparatus is to be installed on a person's spinal column, one force transmitting member is mounted in an opening formed in the displaced vertebra and at least one other force transmitting member is mounted in an opening in an adjacent vertebra. The force transmitting member preferably have a portion which securely locks in part of the bone of the vertebra in which they are mounted and a threaded portion which projects outwardly from the vertebrae. A spinal plate is then positioned so that it extends across the displaced vertebra into abutting engagement with vertebrae on opposite sides of the displaced vertebra.
The spinal plate has a series of openings therein for receiving the threaded portions of the force transmitting members. The openings are elongated s]ots so that the ~2~9~
positioning of the spinal plate and the force transmitting members can vary. This allows the force transmitting members to be positioned on the vertebra where desired and enables the spine plate to be used with difEerent size vertebra and vertebra which are spaced di~ferently.
After the spine plate is located with force transmitting members extending through the slots thereof, the displaced vertebra is pulled into the desired relationship with adjacent vertebrae by tightening a nut on an outwardly projecting end portion of the force transmitting member. Since the force transmitt;ng member was previously connected with the displaced vertebra, tightening of the nut applies little or no torsional force to the displaced vertebra. Therefore7 tightening the nut pulls the displaced vertebra straight outward toward the desired position with a minirnum of twisting of the displaced vertebra. Also~ nuts are threaded onto the threaded portion of the force transmitting member or members in the vertebrae adjacent to the displaced vertebra. As a result, the vertebrae are secured together in a straightened condition by the spine plate.
The spine plate has a series of conical recesses in which the nuts which are also conical rest. The series oE
recesses are located along the slots through which the threaded portion of the force transmitting member extends.
Thus, the ability to locate the force transmitting members as desired in the vertebrae is maintained.
~ .
o Brief Desc~ ion_of the Dra~in~
The foregoing and other objects and features of the present invention will become more apparent ~p~n a consideration of the followlng description taken in connection with the accompanying drawings wherein:
Fig. 1 is a fragmentary dorsal view of a portion of a vertebral or spinal column on which apparatus constructed in accordance with the present invention has been installed to reduce the extent of displacement between adjacent vertebrae;
Fig. 2 is a schematic illustration of the vertebral column of Fig. 1 prior to movement of a displaced vertebrae to a desired position relative to adjacent i vertebrae by the apparatus illustrated in Fig. l;
Fig. 3 is a view, taken generally along the line 3-3 of Fig. 2, further illustrating the vertebral column;
Fig. 4 is a view, generally similar to Fig. 3, of the vertebral column with spinous processes removed from the vertebrae and with holes Eormed in the vertebrae;
Fig. 5 is a view illustrating the manner in which spinal plates are mounted on the vertebrae of Fig. 4 to move a displaced vertebra into a desired position relative to adjacent vertebrae;
Fig. 6 is an enlarged fragmentary illustration depicting the manner in which one end portion of a force transmitting member engages a ver-tebra and the opposite ~2~ 39~
end portion of the force transmitting member engages a nut which presses against a spinal plate;
Fig. 7 is an enlarged schematic illustration depicting the manner in which -the force transmitting member of Fig.
6 is mounted in a hole formed in a displaced vertebra;
Fig. 8 is a schematic illustration depicting the manner in which the-displaced vertebra is moved relative to the adjacent vertebrae to reduce the displacement between the vertebrae;
Fig. 9 is a top plan view of the spinal plate;
Fig. 10 is a se~tional view of the spinal plate taken along the line 10-1~ of Fig. 9;
Fig. 11 is a bottom plan view of the spinal plate, taken generally along the line 11-11 of Fig. 10;
Fig. 12 is a schematic illustration of a second embodiment of the invention in which an insert is mounted in an opening formed in a vertebra;
Fig. 13 is a fragmentary schematic illustration, generally similar to Fig. 8, illustrating the manner in which the extent of displacement between adjacent vertebrae is reduced with the second embodiment of the invention; and Fig. 14 is an enlarged fragmentary sectional view illustrating the relationship between the insert of Fig.
12 and a force transmitting member, the insert being shown in a contracted position prior to being expanded into engagement with the side of a hole formed in a vertebra.
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Descr.iption o~ Specific Preferre~ Embodiments of the Invention _____ General Description ____ A pair of assemblies 20 for reducing the extent of displacement between adjacent vertebrae 22 and maintaining the vertebrae in the reduced displacement relationship are illustrated in Fig. 1 installed on a person's vertebral or spinal column 24. Each of the assembl;es ~0 includes an elongated rigid spinaL plate 30 which is mounted on the vertebrae 22 by a plurality of identical fastener assemblies 32~
The illustrated spinal plates 30 have a length so as to span five adjacent vertebrae 22 (see Fig. 5). A pair of fastener assemblies 32 is provided for each vertebra 22 to connect it with each of the spinal plate 30.
Prior to installation of the assemblies 20, a vertebra 22a occupies a displaced position relative to adjacent vetebrae 22b and 22c (see Figs. 2 and 3). The assemblies 20 are installed to reduce the extent of displacement between the vertebra 22a and the adjacent vertebrae 22b and 22c. Once installed, the assemblies 20 maintain the vertebra 22a in the reduced displacement relationship with the adjacent vertebrae 22b and 22c.
When the assemblies 20 are to be installed, the sharp blunt spinous processes 36 which project from the vertebrae 22 (Figs~ 2 and 3) are removed (Fig. 4). A pair o or series of vert;cally aligned holes 40 (see Fig. 4~ are then drilled in the vertebrae 22. The fastener assemblies 32 are mounted in the holes 40.
The fastener assemblies 32 associated with the vertebrae 22 which are above and below the displaced vertebra 22a are tightened to anchor the spinal plat2s 30 in place bridging the space across the displaced vertebra 22a. The fastener assemblies 32 connected with the displaced vertebrae 22a are then tightened to pull the displaced vertebrae 22a toward the right (as viewed in Fig~ ~). This reduces the extent of displacement between the vertebra 22a and the adjacent vertebrae 22. The fastener assemblies 32 cooperate with the vertebrae 22 and the spinal plates 30 to maintain t'ne displaced vertebra 22a in the reduced displacement position relative to the adjacent vertebrae~
Fastener Assembly - First Embodiment Each of the ident;cal fastener assemblies 32 includes an axially extending stainless steel Eorce transmitting member 44 ~Fig. 6). The force transmitting member 4~ has a mounting end portion 46 ~hich is received in a cylindrical hole 4n in a vertebra 22 and a retaining end portion 48 which engages a nut 50. The force transmitting member 44 extends through an elongated slot 52 formed in the spinal plate 30. Therefore, when the nut 50 is ~- ~22~9~
tightened/ the spinal plate 30 is pressed against the vertebra 22.
The mounting end portion 46 of the force transmitting member 44 is provi.ded ~ith a relatively large diameter helix 56 (F.igs. 6 and 7). When the force transmitting member 44 is pressed axially into a hole 40 in a vertebra and rotated, the helix 56 screws itself into the hole.
The helix 56 has a substantially larger crest diameter than the inside diameter of the hole 40 so that the helix cuts into the cylindrical side surface S8 of t'ne hole 40 ii to firmly mount the force transmitting member 44 in the vertebra 22.
The force transmitting member 50 has a very short cylindrical shank portion 62 (Fig. 6) with an outside diameter correponding to the outside diarneter of a cylindrical stainless blank from which the force transmitting member 44 was formed. In order to provide a solid grip between the helix 56 and vertebra 22, the metal ¦ of the blank was worked to form the helix 56 with a relatively large crest diameter and a relatively small root diameter. This results in the helix having flank surfaces 64 and 66 which project into the bone of the vertebra 22 for a substantial distance to firmly hold the force transmitting member 44 against axial movement relative to the vertebra 22.
The helix 56 is turned into the hole 40, which has a diameter ~hich is only slightly greater than the diameter ~:2~
of the shank 62, by applying torque to wrenc~-ing rlats 70 formed on the retaining end portion 48 of the ~orce transmitting member 44. If desired, a slot or other aperture could be formed to receive a screwdriver rather than having wrenching flats 70.
The retaining end portion 48 of the force transmitting member 40 has a standard external screw thread 74 (Fig. 6) which engages a standard internal thread 76 formed in the nut 50. The nut 50 has wrenching flats 80 which are gripped by a suitable wrench to rotate the nut relative to the external thread 74. A conical leading end portion 82 of the nut 50 moves into abutting engagement with the spinal plate 30 as the nut is .ightened onto the force transmitting member 44.
Installation When the assemblies 20 are to be installed on a vertebral column 24, the spinous processes 36 are removed and the holes 40 are drilled in the vertebrae 22. Force transmitting members 44 are then mounted in the displaced vertebra 22a, the pair of vertebra 22 immediately above I the displaced vertebra 22a, and the pair of vertebra 22 immediately below the displaced vertebra 22a. To mount a force transmitting member 44t it is pressed axially into a hole 40 formed in tha vertebra 22 (see Fig. 7) and twisted by applying torque to the wrenching flats 70. This causes the helix 56 to twist into the hole 40.
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~2~
When the force transmittiny memhers 44 have been mounted in the vertebra 22, the force transmitting members extend outwardly from the vertebra in a vertical array. A
spinal plate 30 is then positioned on the vertebral colurnn with the force transitting members 4a extending through slots 52 formed along the longitudinal central axis of the spinal plate 30 (see Fig. 9). The force transmitting member 30 is then pressed into firm abutting engagement ~ith the vertebrae 22 immediately above and belo~ the displaced vertebra 22a by ti~htening the nuts 50 on the outwardly projecting retaining end portions 48 of the force transmitting members 44. This results in the spinal plate 30 being firmly anchored in a position in which it bridges the space across the displaced verte'Dra 22a.
Positioning of the spinal plate 30 is facilitated because the axially extending slots 52 in the spinal plate enables its position to be adjusted to accommodate different size vertebrae 22~ Thus, the axial position of the spinal plate 30 can be adjusted vertically relative to the vertebrae 22. If a single circular hole had been provided in the spinal plate 30 for each of the force transmitting members 44, the force transmitting members 44 would have to be located relative to the vertebrae in positions dictated by the locations of the holes in the spinal plate rather than by the size and shape of the vertebrae Eorming the spinal column.
~2~9~
Once the spinal plate 30 has been firmly anchored by the fastener assemblies 32 disposed on opposite sides of the displaced vertebra 22a, the fastener assembly 32 connected with the displaced vertebra 22a is tightened.
This causes the displaced vertebra to be pulle~ to the desired position under the influence of axial forces applied to the displaced vertebra by the force transmitting member 44.
To tig'nten the fastener assembly 32, the nut 50 is rotated relative to the external threads 74 on the retaining end portion 48 of the force transmitting member. As the nut 50 is rotated, the wrenching flats 70 (see Fig. 6) are held to prevent the application of twisting or torsional forces to the vertebra 22a. This results in the vertebra 22a being pulled straight rightwardly from the displaced position shown in solid lines in Fig. 8 to the desired position shown in dashed lines. Due to the absence of torsional or twisting forces on the vertebra 22a, the vertebra does not tend to become twisted or cocked relative to the adjacent vertebra 22b and 22c. When the fasteners 32 have been tightened and the displaced vertebra 22a moved to the desired position, the projecting end portions of the force transmitting members 44 are cut off.
In the specific instance illustrated in Fig. 8, the displaced vertebra 22a is pulled into abutting engagement -12 ~2~
with the spi.nal plate 30 by tighten;ng the nut 50 on the force transmitting memher 4~. However, it is contemplated that in certain circumstance.s it may be desirabl.e to pull the displaced vertebra 22a only part way toward the spinal plate 30 so that there is a small space between the spinal plate and the previously displaced vertebra 22a. In addtion, it is contemplated that the spinal plate 30 may cooperate with the vertebra 22b or the vertebra 22c to move either or both of these vertebrae from a displaced position to a desired position along wlth the vertebra ~2a.
Spinal Plate The construction of the spinal plate 30 is illustrated in Figs~ 9-11. The spinal plate 30 includes a pair of parallel longitudin~lly extending beam sections 88 and 90 which are interconnected by a plurality of cross sections g4, 96, 98, 100, 102 and 104. The cross sections 94-104 cooperate with the beam sections 88 and 90 to define the slots 52.
The spinal plate 30 has a bottom side surface 108 (Fig. 11) in which a plurality of grooves 110 are formed.
The grooves 110 tend to prevent sliding of the spinal plate 30 relative to the vertebrae 22. In addition/ the bony material of the vertebrae 22 tends to grow into the grooves 110 to further hold the spine plate 30 against movement relative to the vertebrae 22.
-13~ 9~
The slots 52 are provided with a bevelled upper or outer edge portions 114 (Fig. 9) which slopes at the same angle as the conical outer side surface 82 (see Fig. 6) o~
the nut 50. A plurality of scallops or recesses 116 are provided in the bevelled edge portions 114 to engage conical side surfaces 82 of the nut 50. The recesses 11~
hold the nuts 50 against sidewise movement relative to the spinal plate 30. The recesses 116 are defined by surfaces which form a portion of a cone having the same included angle as the side surfaces 82 of the nuts 50.
Fastener Assembly - Second Embodiment In the embodiment of the ;nvention illustrated in Figs. 1-11, the fastener assemblies 32 are provided with force transmitting members 44 having helices 56 which engage the bony material of the vertebrae 22. In the embodiment of the invention illustrated in Figs. 12-14, the fastener assemblies are provided with inserts which re engaged by the force transmitting members and are expanded into gripping engagement with the underside surfaces of the holes formed in the vertebrae. Since the embod;ment of the invention illustrated in Figs. 12-14 is generally similar to the embodiment of the invention illustrated in Figs. 1-11, similar numerals will be utilized to designate similar components.
In the embodiment of the invention shown in Figs.
12-14, each of the fastener assemblies 32 includes an ~, .
~2~
insert 122 which is actuated from the contracted condition of Figs. 12 and ~ to the expanded conditioil of Fig. 13 to firm]y grip the inner side surface 58 of a hole 40 formed in the vertebra 22a. The insert 122 is molded of one piece from a suitable polymeric material, such as polyethylene.
The insert 122 has a cylindrical outer side wall 126 (Fig. 14) from which a plurality of annular ridges 128 extend. The insert 122 has a threaded central opening 132. The opening 132 extends inwardly from an end surface 134 ~Fig. 12) to cam surfaces 136 and 138 fromed on end sections 140 and 142 of the insert. The end sections 140 and 142 are separated by an axially extending slot 144 which extends diametrically across one end of the inser-t 122.
The insert 122 is positioned in the hole 40 by Lorcing the insert axially into the hole while rotating the insert about its central axis. To facilitate insertion of the insert 122 into the hole 40, the insert is provided with wrenching flats 148 at the outer end of the fastener.
Once the insert 122 has been positioned in the hole 40 r an externally threaded force transmitting member 152 is turned into the internally threaded central openiny 132 in the insert. As the force transmitting member 152 moves into the insert, a leading conical end portion 154 of the force transmitting member 152 moves into abutting ~;~2~
engagement with the cam surfaces 136 and 138. Continued rotation of the force transmitting member 152 causes the conical leading end portion 154 of the force transmitting member 152 to separate or cam the end sections 140 and 1~2 apart to expand the fastener (see Fig. 13).
As the end sections 1~0 and 142 are separated by the camming action of the force transmitting member 152 against the cam surfaces 136 and 138, the annular ridges 128 on the end sections 140 and 142 are pressed into the bony material of the vertebra 22. The outer end of the force transmitting member 152 may be provided with wrenching flats to facilitate rotation of the force transmit.ing member 152 relative to the insert 1~.2.
After the insert 122 has been expanded by the force transmitting member 152, a nut 50 (see Fig. 13~ is turned onto the force transmitting member 152. The ridges 128 hold the insert 122 against rotation relative to the vertebra 22a as the nut 50 is rotated. As the nut 50 is rotated, the force transmitting member 152 pulls the verte~ra 22a from the displaced position shown in solid lines in Fig. 13 to a desired position shown in dashed lines in Fig. 13.
Summary The present invention provides an apparatus 20 which reduces the extent of displacement between adjacent ~ . .
~2~9~1) vertebrae 22 by pu:l].iny a displaced vertebra 22a into a desired position (shown in dashed ].ine in Fi~. 8! and maintaining it in the clesired position~ Wnen the apparatus is to be installed on the spinal column 2~ of a person, a force transmitting member 4~ is moun~ed in an opening 40 formed in the displaced vertebra 22a. A spinal plate 30 is then positioned so that it extends across the displaced vertebra 22a into abutting engagement with vertebrae 22b and 22c on opposite sides of the displaced vertebra. The displaced vertebra 22a is then pulled into the desired relationship with te adjacent vertebrae by tightening a nut 50 on an outwardly projecting end portion of the force transmitting member 44. Since the force . transmitting member 4~ was previously connected with the displaced vertebra 22a, tightening of the nut 50 applies little or no torsional froce to the displaced vertebra 22a. There~ore, tightening the nut 50 pulls the displaced vertebra 22a straight outward from the displaced position shown in solid lines in Fig. 8 toward the desired position shown in dashed lines in Fig. 8 with a minimurn of t~7isting of the displaced vertebra 22a.
Claims (17)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An apparatus for maintaining vertebrae in a desired relationship, said apparatus comprising an elongated plate having one side with surface means for engaging first and second vertebrae disposed on opposite sides of a third vertebra and for bridging the space between the first and second vertebrae, first fastener means for securing said plate to the first vertebra with said surface means in abutting engagement with the first vertebra, second fastener means for securing said plate to the second vertebra with said surface means in abutting engagement with the second vertebra, and third fastener means for securing said plate to the third vertebra with said surface means in abutting engagement with the third vertebra and with said plate spanning the space between the first and second vertebrae, said third fastener means including a force transmitting member and a nut, said force transmitting member having a first end portion which is received in an opening formed in the third vertebra to connect the force transmitting member with the third vertebra and a second end portion which extends through an opening in said plate and has an external thread, said nut being disposed in engagement with the external thread on said second end portion of said force transmitting member and with said plate, said nut being rotatable relative to said force transmitting member and said plate to press the third vertebra against said plate without rotating said force transmitting member relative to the third vertebra.
17 '
17 '
2. An apparatus as set forth in claim 1 wherein said elongated plate includes a pair of parallel and longitudinally extending side sections having a length sufficient to engage at least three adjacent vertebrae, said side sections being connected by a plurality of cross sections.
3. An apparatus as set forth in claim 1 wherein said plate includes a plurality of elongated slot means extending along the longitudinal central axis of said plate, one of said slot means defining the opening through which the second end portion of said force transmitting member extends, said first, second and third fastner means extending through said slot means at locations determined by the size of the first, second and third vertebrae.
4. An apparatus as set forth in claim 1 wherein said first end portion of said force transmitting member includes a helix which has a crest diameter which is greater than a crest diameter of the external thread on said second end portion of said force transmitting member and a root diameter which is less than the root diameter of the external thread on said second end portion of said force transmitting member, said helix having flank surface means projecting radially outwardly through the side surface of the opening formed in the third vertebra to securely connect said force transmitting member with the third vertebra.
5. An apparatus as set foth in claim 1 wherein said third fastener means includes an insert which is disposed in the opening in the third vertebra in a telescopic relationship with the first end portion of said force transmitting member, said insert having internal thread means for engaging an external thread on said first end portion of said force transmitting member, said insert having external ridge means for engaging the third vertebra, and said ridge means including a plurality of ridges extending radially outward for engaging said opening.
6. An apparatus as set forth in claim 5 wherein said insert includes a plurality of sections which are movable from a contracted condition to an expanded condition to increase the exterior size of said insert, said insert including cam surface means connected with said sections for cooperating with the first end portion of said force transmitting member to move said sections from the contracted condition to the expanded condition under the influence of forces applied against said cam surface means by the first end portion of said force transmitting member.
7. An apparatus as set forthin claim 1 wherein said plate includes surface means for defining a slot which extends along the third vertebra and through which said third fastener means extends to enable the position of said plate to be adjusted relative to said third fastener means.
8. An apparatus as set forth in claim 7 wherein said slot includes surface means for engaging said nut to hold said nut against sidewise movement relative to said plate as said nut is rotated relative to said force transmitting member.
9. An apparatus as set forth in claim 1 wherein said opening in said plate is a slot extending through said plate transversely to said surface means and located along the longitudinal central axis of said plate, said slot for receiving said third fastener means therein at any one of a plurality of locations along the slot, said slot being defined by parallel surfaces extending longitudinally of said plate and arcuate recesses in said parallel surfaces and spaced therealong, the recesses in one of said parallel surfaces being aligned with the recesses in the other of said parallel surfaces to define said plurality of locations, the surfaces defining said recesses comprising means for blocking sliding movement of said plate relative to said third fastener means for connecting said plate to the third vertebra and the third vertebra in all directions by engagement with said third fastener means in one of said locations.
10. An apparatus for use with fasteners for maintaining vertebrae in a desired relationship, said apparatus comprising:
an elongated plate for connecting at least two adjacent vertebrae, said elongated plate having a first major side surface for engaging the vertebrae and a second major side surface extending generally parallel to said first major side surface, said first and second major side surfaces having first and second minor side surfaces extending therebetween;
said elongated plate also having at least one elongated slot extending therethrough and intersecting said first and second major side surfaces and located along the longitudinal central axis of said elongated plate, said slot being capable of receiving a fastener therein at any one of a plurality of locations along the slot;
said slot being defined by parallel surfaces extending longitudinally of said elongated plate and arcuate recesses in said parallel surfaces and spaced therealong, the recesses in one of said parallel surfaces being aligned with the recesses in the other of said parallel surfaces to define said plurality of locations, the surfaces defining said recesses comprising means for blocking sliding movement of said elongated plate relative to fasteners for connecting said elongated plate to the vertebrae and the vertebrae in all directions by engagement with a fastener in one of said locations.
an elongated plate for connecting at least two adjacent vertebrae, said elongated plate having a first major side surface for engaging the vertebrae and a second major side surface extending generally parallel to said first major side surface, said first and second major side surfaces having first and second minor side surfaces extending therebetween;
said elongated plate also having at least one elongated slot extending therethrough and intersecting said first and second major side surfaces and located along the longitudinal central axis of said elongated plate, said slot being capable of receiving a fastener therein at any one of a plurality of locations along the slot;
said slot being defined by parallel surfaces extending longitudinally of said elongated plate and arcuate recesses in said parallel surfaces and spaced therealong, the recesses in one of said parallel surfaces being aligned with the recesses in the other of said parallel surfaces to define said plurality of locations, the surfaces defining said recesses comprising means for blocking sliding movement of said elongated plate relative to fasteners for connecting said elongated plate to the vertebrae and the vertebrae in all directions by engagement with a fastener in one of said locations.
11. An apparatus as set forth in claim 10 wherein each of said recesses have a frustoconical configuration for engaging an exterior surface of the fastener to center the fastener relative to said recess.
12. An apparatus as defined in claim 10 wherein each of said recesses is defined by a conical surface which extends between said second major side surface and one of said parallel surfaces defining said slot, said elongated plate being of sufficient length to span at least three adjacent vertebrae and including a plurality of slots located along the longitudinal central axis of said elongated plate, and each of said plurality of slots being disposed along said elongated plate to receive a fastener connectible with a vertebra therethrough.
13. An apparatus for maintaining vertebrae in a desired relationship, said apparatus comprising an elongated plate having one side with surface means for engaging first and second vertebrae, first fastener means for securing said plate to the first vertebra with said surface means in abutting engagement with the first vertebra, second fastener means for securing said plate to the second vertebra with said surface means in abutting engagement with the second vertebra, said second fastener means including a force transmitting member and a nut, said force transmitting member having a first end portion which is received in an opening formed in the second vertebra and connects the force transmitting member with surfaces of the second vertebra defining the opening therein and a second end portion which extends through an opening in said plate and has an external thread, said nut being disposed in threaded engagement with the external thread on said second end portion of said force transmitting member and with said plate, said nut being rotatable relative to said force transmitting member and said plate to press said plate against the second vertebra.
14. An apparatus as set forth in claim 13 wherein said plate includes an elongated slot extending along the longitudinal central axis of said plate, said first and second fastener means being disposed in engagement with said slot at locations determined by the locations of the first and second vertebrae along said plate, and said second portion of said force transmitting member extending through said slot.
15. An apparatus as set forth in claim 13 wherein said first end portion of said force transmitting member includes a helix which has a crest diameter which is greater than a crest diameter of the external thread on said second end portion of said force transmitting member and a root diameter which is less than the root diameter of the external thread on said second end portion of said force transmitting member, said helix having a flank surface projecting radially outwardly through said surface defining the opening in the second vertebra to securely connect said force transmitting member with the second vertebra.
16. An apparatus as set forth in claim 13 wherein said plate includes surface means defining a slot which extends adjacent the second vertebra and through which said second fastener means extends to enable the location of said plate to be adjusted relative to said second fastener means.
17. An apparatus as set forth in claim 16 wherein said slot means further includes a plurality of frustoconical surfaces disposed along said slot for engaging said nut to hold said nut against movement relative to said plate as said nut presses said plate against the second vertebra.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US562,438 | 1983-12-16 | ||
US06/562,438 US4611581A (en) | 1983-12-16 | 1983-12-16 | Apparatus for straightening spinal columns |
Publications (1)
Publication Number | Publication Date |
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CA1224990A true CA1224990A (en) | 1987-08-04 |
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ID=24246286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA000459110A Expired CA1224990A (en) | 1983-12-16 | 1984-07-18 | Apparatus for straightening spinal columns |
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US (1) | US4611581A (en) |
CA (1) | CA1224990A (en) |
Families Citing this family (298)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4696290A (en) * | 1983-12-16 | 1987-09-29 | Acromed Corporation | Apparatus for straightening spinal columns |
GB2173104B (en) * | 1984-02-28 | 1987-11-25 | Peter John Webb | Spinal fixation apparatus |
CN1006954B (en) * | 1985-03-11 | 1990-02-28 | 阿图尔·费希尔 | Fastening elements for osteosynthesis |
US4743260A (en) * | 1985-06-10 | 1988-05-10 | Burton Charles V | Method for a flexible stabilization system for a vertebral column |
EP0209685A3 (en) * | 1985-07-12 | 1988-11-09 | Fischerwerke Arthur Fischer GmbH & Co. KG | Fixation element for osteosynthesis |
US4854311A (en) * | 1986-01-09 | 1989-08-08 | Acro Med Corporation | Bone screw |
US4771767A (en) * | 1986-02-03 | 1988-09-20 | Acromed Corporation | Apparatus and method for maintaining vertebrae in a desired relationship |
US4705030A (en) * | 1987-02-17 | 1987-11-10 | Tepperberg Phillip S | Hand augmenting spinal manipulator encircling the hand |
FR2612762A1 (en) * | 1987-03-27 | 1988-09-30 | Grp Rech Etu Bionique | RACHIS PLATE |
CH672589A5 (en) * | 1987-07-09 | 1989-12-15 | Sulzer Ag | |
US4790297A (en) * | 1987-07-24 | 1988-12-13 | Biotechnology, Inc. | Spinal fixation method and system |
ES2034058T3 (en) * | 1987-07-29 | 1993-04-01 | Acromed Corporation | A DEVICE IMPLANTABLE BY SURGICAL MEANS FOR THE SPINAL COLUMN. |
US4836196A (en) * | 1988-01-11 | 1989-06-06 | Acromed Corporation | Surgically implantable spinal correction system |
CH674705A5 (en) * | 1988-04-27 | 1990-07-13 | Sulzer Ag | |
US5484437A (en) * | 1988-06-13 | 1996-01-16 | Michelson; Gary K. | Apparatus and method of inserting spinal implants |
AU7139994A (en) | 1988-06-13 | 1995-01-03 | Karlin Technology, Inc. | Apparatus and method of inserting spinal implants |
US6210412B1 (en) | 1988-06-13 | 2001-04-03 | Gary Karlin Michelson | Method for inserting frusto-conical interbody spinal fusion implants |
US5015247A (en) * | 1988-06-13 | 1991-05-14 | Michelson Gary K | Threaded spinal implant |
US5772661A (en) * | 1988-06-13 | 1998-06-30 | Michelson; Gary Karlin | Methods and instrumentation for the surgical correction of human thoracic and lumbar spinal disease from the antero-lateral aspect of the spine |
US7491205B1 (en) | 1988-06-13 | 2009-02-17 | Warsaw Orthopedic, Inc. | Instrumentation for the surgical correction of human thoracic and lumbar spinal disease from the lateral aspect of the spine |
US7452359B1 (en) | 1988-06-13 | 2008-11-18 | Warsaw Orthopedic, Inc. | Apparatus for inserting spinal implants |
US6120502A (en) | 1988-06-13 | 2000-09-19 | Michelson; Gary Karlin | Apparatus and method for the delivery of electrical current for interbody spinal arthrodesis |
US6770074B2 (en) | 1988-06-13 | 2004-08-03 | Gary Karlin Michelson | Apparatus for use in inserting spinal implants |
US6923810B1 (en) | 1988-06-13 | 2005-08-02 | Gary Karlin Michelson | Frusto-conical interbody spinal fusion implants |
US6123705A (en) | 1988-06-13 | 2000-09-26 | Sdgi Holdings, Inc. | Interbody spinal fusion implants |
US7534254B1 (en) | 1988-06-13 | 2009-05-19 | Warsaw Orthopedic, Inc. | Threaded frusto-conical interbody spinal fusion implants |
US5084049A (en) * | 1989-02-08 | 1992-01-28 | Acromed Corporation | Transverse connector for spinal column corrective devices |
US5059193A (en) * | 1989-11-20 | 1991-10-22 | Spine-Tech, Inc. | Expandable spinal implant and surgical method |
WO1991016020A1 (en) * | 1990-04-26 | 1991-10-31 | Danninger Medical Technology, Inc. | Transpedicular screw system and method of use |
US5269785A (en) * | 1990-06-28 | 1993-12-14 | Bonutti Peter M | Apparatus and method for tissue removal |
US5129900B1 (en) * | 1990-07-24 | 1998-12-29 | Acromed Corp | Spinal column retaining method and apparatus |
US5113685A (en) * | 1991-01-28 | 1992-05-19 | Acromed Corporation | Apparatus for contouring spine plates and/or rods |
DE69225521T2 (en) * | 1991-03-27 | 1998-10-01 | Smith & Nephew Inc | Bone fixation device |
US5486176A (en) * | 1991-03-27 | 1996-01-23 | Smith & Nephew Richards, Inc. | Angled bone fixation apparatus |
US5261911A (en) * | 1991-06-18 | 1993-11-16 | Allen Carl | Anterolateral spinal fixation system |
US5152303A (en) * | 1991-06-18 | 1992-10-06 | Carl Allen | Anterolateral spinal fixation system and related insertion process |
PT100685A (en) * | 1991-07-15 | 1994-05-31 | Danek Group Inc | SPINAL FIXING SYSTEM |
US6503277B2 (en) | 1991-08-12 | 2003-01-07 | Peter M. Bonutti | Method of transplanting human body tissue |
US5167664A (en) * | 1991-08-26 | 1992-12-01 | Zimmer, Inc. | Ratcheting bone screw |
US5176679A (en) * | 1991-09-23 | 1993-01-05 | Lin Chih I | Vertebral locking and retrieving system |
US5209751A (en) * | 1992-02-19 | 1993-05-11 | Danek Medical, Inc. | Spinal fixation system |
US5171279A (en) * | 1992-03-17 | 1992-12-15 | Danek Medical | Method for subcutaneous suprafascial pedicular internal fixation |
ES2048100B1 (en) * | 1992-04-24 | 1994-10-01 | Bilbao Ortiz De Zarate Jose Ra | IMPROVEMENTS IN THE TRANSPEDICULAR VERTEBRAL FIXATION SYSTEM AND DEVICE FOR ITS PRACTICE. |
EP0570929B1 (en) * | 1992-05-18 | 1995-06-28 | Pina Vertriebs Ag | Implant for the spine |
US5368593A (en) * | 1992-07-07 | 1994-11-29 | Stark; John G. | Devices and methods for attachment of spine fixation devices |
EP0599766A1 (en) * | 1992-09-07 | 1994-06-01 | José Vicente Barbera Alacreu | Cervical vertebral fusion system |
CA2106866C (en) * | 1993-05-11 | 1999-02-09 | Johannes Fridolin Schlapfer | Osteosynthetic fastening device and manipulating aid thereto |
DE69434145T2 (en) | 1993-06-10 | 2005-10-27 | Karlin Technology, Inc., Saugus | Wirbeldistraktor |
US5344421A (en) * | 1993-07-16 | 1994-09-06 | Amei Technologies Inc. | Apparatus and method for adjusting a bone plate |
AU696256B2 (en) * | 1993-07-16 | 1998-09-03 | Artifex Ltd. | Implant device and method of installing |
US5395372A (en) * | 1993-09-07 | 1995-03-07 | Danek Medical, Inc. | Spinal strut graft holding staple |
ES2099008B1 (en) * | 1993-10-07 | 1997-11-16 | Alacreu Jose Vicente Barbera | IMPROVEMENTS IN THE CERVICAL VERTEBRAL FUSION SYSTEMS AND DEVICE FOR ITS PRACTICE. |
ATE262839T1 (en) * | 1993-11-19 | 2004-04-15 | Cross Med Prod Inc | MOUNTING ROD SEAT WITH SLIDING LOCK |
US5466237A (en) * | 1993-11-19 | 1995-11-14 | Cross Medical Products, Inc. | Variable locking stabilizer anchor seat and screw |
CA2551185C (en) * | 1994-03-28 | 2007-10-30 | Sdgi Holdings, Inc. | Apparatus and method for anterior spinal stabilization |
US5885299A (en) * | 1994-09-15 | 1999-03-23 | Surgical Dynamics, Inc. | Apparatus and method for implant insertion |
EP0781113B1 (en) * | 1994-09-15 | 2002-03-27 | Surgical Dynamics, Inc. | Conically-shaped anterior fusion cage |
US6001102A (en) * | 1994-12-08 | 1999-12-14 | Jose Vicente Barbera Alacreu | Transpedicular vertebral attachment systems and device for the practice thereof |
US20040049197A1 (en) * | 1994-12-08 | 2004-03-11 | Jose Vicente Barbera Alacreu | Dorsolumbar and lumbosacral vertebral fixation system |
US5620443A (en) * | 1995-01-25 | 1997-04-15 | Danek Medical, Inc. | Anterior screw-rod connector |
US6758849B1 (en) | 1995-02-17 | 2004-07-06 | Sdgi Holdings, Inc. | Interbody spinal fusion implants |
CN1134810A (en) | 1995-02-17 | 1996-11-06 | 索发默达纳集团股份有限公司 | Improved interbody spinal fusion implants |
DE19607517C1 (en) * | 1996-02-28 | 1997-04-10 | Lutz Biedermann | Bone screw for osteosynthesis |
US5785712A (en) * | 1996-04-16 | 1998-07-28 | Terray Corporation | Reconstruction bone plate |
US5713900A (en) * | 1996-05-31 | 1998-02-03 | Acromed Corporation | Apparatus for retaining bone portions in a desired spatial relationship |
AU1997797A (en) * | 1996-05-31 | 1997-12-04 | Acromed Corporation | An apparatus comprising a plate and a fastener for connecting the plate to a bone portion |
US5782831A (en) * | 1996-11-06 | 1998-07-21 | Sdgi Holdings, Inc. | Method an device for spinal deformity reduction using a cable and a cable tensioning system |
US6004323A (en) * | 1997-02-04 | 1999-12-21 | The University Of Iowa Research Foundation | Surgically implantable fastening system |
US5713904A (en) * | 1997-02-12 | 1998-02-03 | Third Millennium Engineering, Llc | Selectively expandable sacral fixation screw-sleeve device |
US6123707A (en) * | 1999-01-13 | 2000-09-26 | Spinal Concepts, Inc. | Reduction instrument |
FR2790941B1 (en) | 1999-03-16 | 2001-06-08 | Materiel Orthopedique En Abreg | INSTRUMENTATION OF RACHIDIAN OSTEOSYNTHESIS WITH PLATE AND PEDICULAR SCREW OR TRANSVERSE CONNECTOR BETWEEN A VERTEBRAL ROD AND A PEDICULAR SCREW |
US6206882B1 (en) | 1999-03-30 | 2001-03-27 | Surgical Dynamics Inc. | Plating system for the spine |
US6283967B1 (en) | 1999-12-17 | 2001-09-04 | Synthes (U.S.A.) | Transconnector for coupling spinal rods |
US6251111B1 (en) | 1999-10-20 | 2001-06-26 | Sdgi Holdings, Inc. | Jack for pulling a vertebral anchor |
EP1854433B1 (en) | 1999-10-22 | 2010-05-12 | FSI Acquisition Sub, LLC | Facet arthroplasty devices |
US8187303B2 (en) | 2004-04-22 | 2012-05-29 | Gmedelaware 2 Llc | Anti-rotation fixation element for spinal prostheses |
US7691145B2 (en) | 1999-10-22 | 2010-04-06 | Facet Solutions, Inc. | Prostheses, systems and methods for replacement of natural facet joints with artificial facet joint surfaces |
US7674293B2 (en) | 2004-04-22 | 2010-03-09 | Facet Solutions, Inc. | Crossbar spinal prosthesis having a modular design and related implantation methods |
US6461359B1 (en) | 1999-11-10 | 2002-10-08 | Clifford Tribus | Spine stabilization device |
US6432108B1 (en) | 2000-01-24 | 2002-08-13 | Depuy Orthopaedics, Inc. | Transverse connector |
US6740093B2 (en) | 2000-02-28 | 2004-05-25 | Stephen Hochschuler | Method and apparatus for treating a vertebral body |
US6248107B1 (en) | 2000-03-15 | 2001-06-19 | Sdgi Holdings, Inc. | System for reducing the displacement of a vertebra |
JP2003534849A (en) | 2000-05-30 | 2003-11-25 | リン,ポール・エス | Implant placed between cervical vertebrae |
US6458131B1 (en) | 2000-08-07 | 2002-10-01 | Salut, Ltd. | Apparatus and method for reducing spinal deformity |
US7485132B1 (en) * | 2000-10-06 | 2009-02-03 | Abbott Spine Inc. | Transverse connector with cam activated engagers |
US6887241B1 (en) | 2000-10-06 | 2005-05-03 | Spinal Concepts, Inc. | Adjustable transverse connector with cam activated engagers |
US6872208B1 (en) | 2000-10-06 | 2005-03-29 | Spinal Concepts, Inc. | Adjustable transverse connector |
US6579319B2 (en) | 2000-11-29 | 2003-06-17 | Medicinelodge, Inc. | Facet joint replacement |
US20050080486A1 (en) | 2000-11-29 | 2005-04-14 | Fallin T. Wade | Facet joint replacement |
US6419703B1 (en) | 2001-03-01 | 2002-07-16 | T. Wade Fallin | Prosthesis for the replacement of a posterior element of a vertebra |
US6565605B2 (en) | 2000-12-13 | 2003-05-20 | Medicinelodge, Inc. | Multiple facet joint replacement |
US6972019B2 (en) | 2001-01-23 | 2005-12-06 | Michelson Gary K | Interbody spinal implant with trailing end adapted to receive bone screws |
US7090698B2 (en) | 2001-03-02 | 2006-08-15 | Facet Solutions | Method and apparatus for spine joint replacement |
US6843790B2 (en) | 2001-03-27 | 2005-01-18 | Bret A. Ferree | Anatomic posterior lumbar plate |
US8292926B2 (en) | 2005-09-30 | 2012-10-23 | Jackson Roger P | Dynamic stabilization connecting member with elastic core and outer sleeve |
US6746449B2 (en) | 2001-09-12 | 2004-06-08 | Spinal Concepts, Inc. | Spinal rod translation instrument |
US20040176767A1 (en) * | 2001-09-18 | 2004-09-09 | Bickley Barry T. | Fixation augmentation device and related techniques |
US6899714B2 (en) * | 2001-10-03 | 2005-05-31 | Vaughan Medical Technologies, Inc. | Vertebral stabilization assembly and method |
US7322983B2 (en) * | 2002-02-12 | 2008-01-29 | Ebi, L.P. | Self-locking bone screw and implant |
US6682532B2 (en) | 2002-03-22 | 2004-01-27 | Depuy Acromed, Inc. | Coupling system and method for extending spinal instrumentation |
US7004947B2 (en) * | 2002-06-24 | 2006-02-28 | Endius Incorporated | Surgical instrument for moving vertebrae |
DK1519681T3 (en) * | 2002-07-09 | 2007-04-10 | Aecc Entpr Ltd | Method of Imaging the Relative Movement of Skeletal Pieces |
US7306603B2 (en) | 2002-08-21 | 2007-12-11 | Innovative Spinal Technologies | Device and method for percutaneous placement of lumbar pedicle screws and connecting rods |
US6648888B1 (en) | 2002-09-06 | 2003-11-18 | Endius Incorporated | Surgical instrument for moving a vertebra |
US7066938B2 (en) | 2002-09-09 | 2006-06-27 | Depuy Spine, Inc. | Snap-on spinal rod connector |
US8506605B2 (en) * | 2002-09-18 | 2013-08-13 | Simplicity Orthopedics, Inc. | Method and apparatus for securing an object to bone and/or for stabilizing bone |
WO2004100809A1 (en) * | 2003-05-08 | 2004-11-25 | Bickley Barry T | Fixation augmentation device and related techniques |
US20060293660A1 (en) * | 2005-06-03 | 2006-12-28 | Lewis Edward L | Connector for attaching an alignment rod to a bone structure |
US7011659B2 (en) | 2003-03-17 | 2006-03-14 | Lewis Edward L | Connector for attaching an alignment rod to a bone structure |
US7722653B2 (en) | 2003-03-26 | 2010-05-25 | Greatbatch Medical S.A. | Locking bone plate |
US7905883B2 (en) * | 2003-03-26 | 2011-03-15 | Greatbatch Medical S.A. | Locking triple pelvic osteotomy plate and method of use |
ATE476149T1 (en) * | 2003-03-26 | 2010-08-15 | Swiss Orthopedic Solutions Sa | FIXING BONE PLATE |
US7433005B2 (en) * | 2003-03-31 | 2008-10-07 | Sharp Kabushiki Kaisha | Liquid crystal display device having electrode units each provided with a solid part and an extending part and method of manufacturing the same |
US7481829B2 (en) * | 2003-04-21 | 2009-01-27 | Atlas Spine, Inc. | Bone fixation plate |
US8348982B2 (en) * | 2003-04-21 | 2013-01-08 | Atlas Spine, Inc. | Bone fixation plate |
US20040230304A1 (en) | 2003-05-14 | 2004-11-18 | Archus Orthopedics Inc. | Prostheses, tools and methods for replacement of natural facet joints with artifical facet joint surfaces |
US7608104B2 (en) | 2003-05-14 | 2009-10-27 | Archus Orthopedics, Inc. | Prostheses, tools and methods for replacement of natural facet joints with artifical facet joint surfaces |
US7074238B2 (en) | 2003-07-08 | 2006-07-11 | Archus Orthopedics, Inc. | Prostheses, tools and methods for replacement of natural facet joints with artificial facet joint surfaces |
US20060229729A1 (en) * | 2003-08-05 | 2006-10-12 | Gordon Charles R | Expandable intervertebral implant for use with instrument |
US7316714B2 (en) * | 2003-08-05 | 2008-01-08 | Flexuspine, Inc. | Artificial functional spinal unit assemblies |
US7909869B2 (en) | 2003-08-05 | 2011-03-22 | Flexuspine, Inc. | Artificial spinal unit assemblies |
US7799082B2 (en) * | 2003-08-05 | 2010-09-21 | Flexuspine, Inc. | Artificial functional spinal unit system and method for use |
US7753958B2 (en) * | 2003-08-05 | 2010-07-13 | Gordon Charles R | Expandable intervertebral implant |
US7204853B2 (en) * | 2003-08-05 | 2007-04-17 | Flexuspine, Inc. | Artificial functional spinal unit assemblies |
US20050049595A1 (en) | 2003-09-03 | 2005-03-03 | Suh Sean S. | Track-plate carriage system |
US7909860B2 (en) | 2003-09-03 | 2011-03-22 | Synthes Usa, Llc | Bone plate with captive clips |
US7955355B2 (en) | 2003-09-24 | 2011-06-07 | Stryker Spine | Methods and devices for improving percutaneous access in minimally invasive surgeries |
US8002798B2 (en) | 2003-09-24 | 2011-08-23 | Stryker Spine | System and method for spinal implant placement |
US9078706B2 (en) | 2003-09-30 | 2015-07-14 | X-Spine Systems, Inc. | Intervertebral fusion device utilizing multiple mobile uniaxial and bidirectional screw interface plates |
US8821553B2 (en) | 2003-09-30 | 2014-09-02 | X-Spine Systems, Inc. | Spinal fusion system utilizing an implant plate having at least one integral lock |
US7182782B2 (en) | 2003-09-30 | 2007-02-27 | X-Spine Systems, Inc. | Spinal fusion system and method for fusing spinal bones |
US7641701B2 (en) * | 2003-09-30 | 2010-01-05 | X-Spine Systems, Inc. | Spinal fusion system and method for fusing spinal bones |
US8062367B2 (en) | 2003-09-30 | 2011-11-22 | X-Spine Systems, Inc. | Screw locking mechanism and method |
US8372152B2 (en) | 2003-09-30 | 2013-02-12 | X-Spine Systems, Inc. | Spinal fusion system utilizing an implant plate having at least one integral lock and ratchet lock |
US7837732B2 (en) | 2003-11-20 | 2010-11-23 | Warsaw Orthopedic, Inc. | Intervertebral body fusion cage with keels and implantation methods |
US7753937B2 (en) | 2003-12-10 | 2010-07-13 | Facet Solutions Inc. | Linked bilateral spinal facet implants and methods of use |
US20050131406A1 (en) | 2003-12-15 | 2005-06-16 | Archus Orthopedics, Inc. | Polyaxial adjustment of facet joint prostheses |
US7621938B2 (en) * | 2004-01-15 | 2009-11-24 | Warsaw Orthopedic, Inc. | Spinal implant construct and method for implantation |
US7993373B2 (en) | 2005-02-22 | 2011-08-09 | Hoy Robert W | Polyaxial orthopedic fastening apparatus |
US8562649B2 (en) | 2004-02-17 | 2013-10-22 | Gmedelaware 2 Llc | System and method for multiple level facet joint arthroplasty and fusion |
US8333789B2 (en) | 2007-01-10 | 2012-12-18 | Gmedelaware 2 Llc | Facet joint replacement |
WO2005092224A1 (en) * | 2004-03-11 | 2005-10-06 | Stefan Schwer | Reduction tool |
US20080045960A1 (en) * | 2004-03-25 | 2008-02-21 | Bruecker Kenneth | Locking tpo plate and method of use |
WO2006091827A2 (en) * | 2005-02-25 | 2006-08-31 | Regents Of The University Of California | Device and template for canine humeral slide osteotomy |
US7645294B2 (en) | 2004-03-31 | 2010-01-12 | Depuy Spine, Inc. | Head-to-head connector spinal fixation system |
US7717939B2 (en) | 2004-03-31 | 2010-05-18 | Depuy Spine, Inc. | Rod attachment for head to head cross connector |
US7406775B2 (en) | 2004-04-22 | 2008-08-05 | Archus Orthopedics, Inc. | Implantable orthopedic device component selection instrument and methods |
US7051451B2 (en) | 2004-04-22 | 2006-05-30 | Archus Orthopedics, Inc. | Facet joint prosthesis measurement and implant tools |
US8764801B2 (en) | 2005-03-28 | 2014-07-01 | Gmedelaware 2 Llc | Facet joint implant crosslinking apparatus and method |
US7588578B2 (en) | 2004-06-02 | 2009-09-15 | Facet Solutions, Inc | Surgical measurement systems and methods |
US7591836B2 (en) * | 2004-07-30 | 2009-09-22 | Zimmer Spine, Inc. | Surgical devices and methods for vertebral shifting utilizing spinal fixation systems |
US8114158B2 (en) | 2004-08-03 | 2012-02-14 | Kspine, Inc. | Facet device and method |
DE102004046163A1 (en) | 2004-08-12 | 2006-02-23 | Columbus Trading-Partners Pos und Brendel GbR (vertretungsberechtigte Gesellschafter Karin Brendel, 95503 Hummeltal und Bohumila Pos, 95445 Bayreuth) | Child seat for motor vehicles |
AU2005277363A1 (en) | 2004-08-18 | 2006-03-02 | Fsi Acquisition Sub, Llc | Adjacent level facet arthroplasty devices, spine stabilization systems, and methods |
US7717938B2 (en) | 2004-08-27 | 2010-05-18 | Depuy Spine, Inc. | Dual rod cross connectors and inserter tools |
US7604655B2 (en) | 2004-10-25 | 2009-10-20 | X-Spine Systems, Inc. | Bone fixation system and method for using the same |
JP2008517733A (en) | 2004-10-25 | 2008-05-29 | アルファスパイン インコーポレイテッド | Pedicle screw system and assembly / installation method of the system |
AU2005307005A1 (en) | 2004-10-25 | 2006-05-26 | Fsi Acquisition Sub, Llc | Crossbar spinal prosthesis having a modular design and systems for treating spinal pathologies |
WO2006058221A2 (en) | 2004-11-24 | 2006-06-01 | Abdou Samy M | Devices and methods for inter-vertebral orthopedic device placement |
US7896905B2 (en) * | 2005-02-09 | 2011-03-01 | David Lee | Bone fixation apparatus |
US7722647B1 (en) | 2005-03-14 | 2010-05-25 | Facet Solutions, Inc. | Apparatus and method for posterior vertebral stabilization |
US7338491B2 (en) * | 2005-03-22 | 2008-03-04 | Spinefrontier Inc | Spinal fixation locking mechanism |
US8496686B2 (en) | 2005-03-22 | 2013-07-30 | Gmedelaware 2 Llc | Minimally invasive spine restoration systems, devices, methods and kits |
US7708762B2 (en) * | 2005-04-08 | 2010-05-04 | Warsaw Orthopedic, Inc. | Systems, devices and methods for stabilization of the spinal column |
US20060241593A1 (en) * | 2005-04-08 | 2006-10-26 | Sdgi Holdings, Inc. | Multi-piece vertebral attachment device |
US7674296B2 (en) | 2005-04-21 | 2010-03-09 | Globus Medical, Inc. | Expandable vertebral prosthesis |
US7585312B2 (en) * | 2005-04-29 | 2009-09-08 | Warsaw Orthopedic, Inc. | Spinal stabilization apparatus and method |
US7811310B2 (en) * | 2005-05-04 | 2010-10-12 | Spinefrontier, Inc | Multistage spinal fixation locking mechanism |
JP4613867B2 (en) * | 2005-05-26 | 2011-01-19 | ソニー株式会社 | Content processing apparatus, content processing method, and computer program |
US8080061B2 (en) * | 2005-06-20 | 2011-12-20 | Synthes Usa, Llc | Apparatus and methods for treating bone |
US7717943B2 (en) | 2005-07-29 | 2010-05-18 | X-Spine Systems, Inc. | Capless multiaxial screw and spinal fixation assembly and method |
US20070093822A1 (en) * | 2005-09-28 | 2007-04-26 | Christof Dutoit | Apparatus and methods for vertebral augmentation using linked expandable bodies |
US20080287959A1 (en) * | 2005-09-26 | 2008-11-20 | Archus Orthopedics, Inc. | Measurement and trialing system and methods for orthopedic device component selection |
US7879074B2 (en) | 2005-09-27 | 2011-02-01 | Depuy Spine, Inc. | Posterior dynamic stabilization systems and methods |
US8157806B2 (en) * | 2005-10-12 | 2012-04-17 | Synthes Usa, Llc | Apparatus and methods for vertebral augmentation |
US20070093899A1 (en) * | 2005-09-28 | 2007-04-26 | Christof Dutoit | Apparatus and methods for treating bone |
US7686835B2 (en) | 2005-10-04 | 2010-03-30 | X-Spine Systems, Inc. | Pedicle screw system with provisional locking aspects |
WO2007126428A2 (en) | 2005-12-20 | 2007-11-08 | Archus Orthopedics, Inc. | Arthroplasty revision system and method |
US20070162132A1 (en) | 2005-12-23 | 2007-07-12 | Dominique Messerli | Flexible elongated chain implant and method of supporting body tissue with same |
WO2007130699A2 (en) * | 2006-01-13 | 2007-11-15 | Clifford Tribus | Spine reduction and stabilization device |
US7615652B2 (en) * | 2006-01-26 | 2009-11-10 | Battelle Memorial Institute | Two-stage dehydration of sugars |
EP1981422B1 (en) | 2006-02-06 | 2018-10-24 | Stryker European Holdings I, LLC | Rod contouring apparatus for percutaneous pedicle screw extension |
US7914562B2 (en) * | 2006-02-27 | 2011-03-29 | Zielinski Steven C | Method and apparatus for lateral reduction and fusion of the spine |
US8118869B2 (en) | 2006-03-08 | 2012-02-21 | Flexuspine, Inc. | Dynamic interbody device |
US8676293B2 (en) | 2006-04-13 | 2014-03-18 | Aecc Enterprises Ltd. | Devices, systems and methods for measuring and evaluating the motion and function of joint structures and associated muscles, determining suitability for orthopedic intervention, and evaluating efficacy of orthopedic intervention |
US20080004626A1 (en) * | 2006-05-26 | 2008-01-03 | Glazer Paul A | Orthopedic coil screw insert |
US8172882B2 (en) | 2006-06-14 | 2012-05-08 | Spartek Medical, Inc. | Implant system and method to treat degenerative disorders of the spine |
US8512385B2 (en) * | 2006-07-07 | 2013-08-20 | Swiss Pro Orthopedic Sa | Bone plate with complex, adjacent holes joined by a bend relief zone |
WO2008007196A2 (en) * | 2006-07-07 | 2008-01-17 | Precimed, S.A. | Bone plate with complex, adjacent holes joined by a relief-space |
FR2903880B1 (en) * | 2006-07-24 | 2008-09-12 | Hassan Razian | FASTENING SYSTEM FOR SPINAL OSTEOSYNTHESIS OR THE LIKE |
US8388660B1 (en) * | 2006-08-01 | 2013-03-05 | Samy Abdou | Devices and methods for superior fixation of orthopedic devices onto the vertebral column |
WO2008019397A2 (en) | 2006-08-11 | 2008-02-14 | Archus Orthopedics, Inc. | Angled washer polyaxial connection for dynamic spine prosthesis |
US8672983B2 (en) * | 2006-09-18 | 2014-03-18 | Warsaw Orthopedic, Inc. | Orthopedic plate system |
US8361117B2 (en) | 2006-11-08 | 2013-01-29 | Depuy Spine, Inc. | Spinal cross connectors |
US20080114457A1 (en) * | 2006-11-14 | 2008-05-15 | Warsaw Orthopedic, Inc. | Methods and devices for connecting implants and devices |
WO2008086467A2 (en) | 2007-01-10 | 2008-07-17 | Facet Solutions, Inc. | Taper-locking fixation system |
US9066811B2 (en) * | 2007-01-19 | 2015-06-30 | Flexuspine, Inc. | Artificial functional spinal unit system and method for use |
US8221479B2 (en) * | 2007-01-19 | 2012-07-17 | Pbj, Llc | Orthopedic screw insert |
WO2009085057A2 (en) * | 2007-02-12 | 2009-07-09 | Bishop Randolph C | Spinal stabilization system for the stabilization and fixation of the lumbar spine and method for using same |
WO2008119006A1 (en) | 2007-03-27 | 2008-10-02 | Alpinespine Llc | Pedicle screw system configured to receive a straight or a curved rod |
EP2146652A2 (en) * | 2007-04-23 | 2010-01-27 | Simplicity Orthopedics, Inc. | Method and apparatus for securing an object to bone |
WO2008151091A1 (en) | 2007-06-05 | 2008-12-11 | Spartek Medical, Inc. | A deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method |
US8021396B2 (en) | 2007-06-05 | 2011-09-20 | Spartek Medical, Inc. | Configurable dynamic spinal rod and method for dynamic stabilization of the spine |
US8070776B2 (en) | 2007-06-05 | 2011-12-06 | Spartek Medical, Inc. | Deflection rod system for use with a vertebral fusion implant for dynamic stabilization and motion preservation spinal implantation system and method |
US8114134B2 (en) | 2007-06-05 | 2012-02-14 | Spartek Medical, Inc. | Spinal prosthesis having a three bar linkage for motion preservation and dynamic stabilization of the spine |
US8083772B2 (en) | 2007-06-05 | 2011-12-27 | Spartek Medical, Inc. | Dynamic spinal rod assembly and method for dynamic stabilization of the spine |
US8105356B2 (en) | 2007-06-05 | 2012-01-31 | Spartek Medical, Inc. | Bone anchor with a curved mounting element for a dynamic stabilization and motion preservation spinal implantation system and method |
US8048115B2 (en) | 2007-06-05 | 2011-11-01 | Spartek Medical, Inc. | Surgical tool and method for implantation of a dynamic bone anchor |
US8092501B2 (en) | 2007-06-05 | 2012-01-10 | Spartek Medical, Inc. | Dynamic spinal rod and method for dynamic stabilization of the spine |
US8109970B2 (en) | 2007-06-05 | 2012-02-07 | Spartek Medical, Inc. | Deflection rod system with a deflection contouring shield for a spine implant and method |
EP2155086B1 (en) | 2007-06-06 | 2016-05-04 | K2M, Inc. | Medical device to correct deformity |
US20080312655A1 (en) * | 2007-06-14 | 2008-12-18 | X-Spine Systems, Inc. | Polyaxial screw system and method having a hinged receiver |
US7963982B2 (en) | 2007-07-16 | 2011-06-21 | X-Spine Systems, Inc. | Implant plate screw locking system and screw having a locking member |
US20090099481A1 (en) | 2007-10-10 | 2009-04-16 | Adam Deitz | Devices, Systems and Methods for Measuring and Evaluating the Motion and Function of Joints and Associated Muscles |
US7922747B2 (en) * | 2007-10-17 | 2011-04-12 | X-Spine Systems, Inc. | Cross connector apparatus for spinal fixation rods |
US8187330B2 (en) * | 2007-10-22 | 2012-05-29 | Flexuspine, Inc. | Dampener system for a posterior stabilization system with a variable length elongated member |
US8267965B2 (en) * | 2007-10-22 | 2012-09-18 | Flexuspine, Inc. | Spinal stabilization systems with dynamic interbody devices |
US8162994B2 (en) * | 2007-10-22 | 2012-04-24 | Flexuspine, Inc. | Posterior stabilization system with isolated, dual dampener systems |
US8523912B2 (en) * | 2007-10-22 | 2013-09-03 | Flexuspine, Inc. | Posterior stabilization systems with shared, dual dampener systems |
US8157844B2 (en) * | 2007-10-22 | 2012-04-17 | Flexuspine, Inc. | Dampener system for a posterior stabilization system with a variable length elongated member |
US8182514B2 (en) * | 2007-10-22 | 2012-05-22 | Flexuspine, Inc. | Dampener system for a posterior stabilization system with a fixed length elongated member |
US20090105756A1 (en) | 2007-10-23 | 2009-04-23 | Marc Richelsoph | Spinal implant |
US8821546B2 (en) | 2007-11-06 | 2014-09-02 | Stanus Investments, Inc. | Vertebral screw arrangement with locking pin |
US8029539B2 (en) | 2007-12-19 | 2011-10-04 | X-Spine Systems, Inc. | Offset multiaxial or polyaxial screw, system and assembly |
US7909874B2 (en) * | 2008-01-30 | 2011-03-22 | Zielinski Steven C | Artificial spinal disk |
US8097024B2 (en) | 2008-02-26 | 2012-01-17 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post and method for stabilization of the spine |
US8048125B2 (en) | 2008-02-26 | 2011-11-01 | Spartek Medical, Inc. | Versatile offset polyaxial connector and method for dynamic stabilization of the spine |
US8211155B2 (en) | 2008-02-26 | 2012-07-03 | Spartek Medical, Inc. | Load-sharing bone anchor having a durable compliant member and method for dynamic stabilization of the spine |
US8057517B2 (en) | 2008-02-26 | 2011-11-15 | Spartek Medical, Inc. | Load-sharing component having a deflectable post and centering spring and method for dynamic stabilization of the spine |
US20100030224A1 (en) | 2008-02-26 | 2010-02-04 | Spartek Medical, Inc. | Surgical tool and method for connecting a dynamic bone anchor and dynamic vertical rod |
US8337536B2 (en) | 2008-02-26 | 2012-12-25 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post with a compliant ring and method for stabilization of the spine |
US8333792B2 (en) | 2008-02-26 | 2012-12-18 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post and method for dynamic stabilization of the spine |
US8083775B2 (en) | 2008-02-26 | 2011-12-27 | Spartek Medical, Inc. | Load-sharing bone anchor having a natural center of rotation and method for dynamic stabilization of the spine |
US8267979B2 (en) | 2008-02-26 | 2012-09-18 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post and axial spring and method for dynamic stabilization of the spine |
WO2009155577A2 (en) * | 2008-06-19 | 2009-12-23 | Synthes Usa, Llc | Bone screw purchase augmentation implants, systems and techniques |
US9603629B2 (en) | 2008-09-09 | 2017-03-28 | Intelligent Implant Systems Llc | Polyaxial screw assembly |
US8388659B1 (en) | 2008-10-17 | 2013-03-05 | Theken Spine, Llc | Spondylolisthesis screw and instrument for implantation |
US8828058B2 (en) | 2008-11-11 | 2014-09-09 | Kspine, Inc. | Growth directed vertebral fixation system with distractible connector(s) and apical control |
US8721723B2 (en) | 2009-01-12 | 2014-05-13 | Globus Medical, Inc. | Expandable vertebral prosthesis |
US8357183B2 (en) | 2009-03-26 | 2013-01-22 | Kspine, Inc. | Semi-constrained anchoring system |
US9168071B2 (en) | 2009-09-15 | 2015-10-27 | K2M, Inc. | Growth modulation system |
US9138163B2 (en) | 2009-09-25 | 2015-09-22 | Ortho Kinematics, Inc. | Systems and devices for an integrated imaging system with real-time feedback loop and methods therefor |
EP2506785A4 (en) | 2009-12-02 | 2014-10-15 | Spartek Medical Inc | Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod |
US8764806B2 (en) | 2009-12-07 | 2014-07-01 | Samy Abdou | Devices and methods for minimally invasive spinal stabilization and instrumentation |
US9480511B2 (en) | 2009-12-17 | 2016-11-01 | Engage Medical Holdings, Llc | Blade fixation for ankle fusion and arthroplasty |
US8870880B2 (en) | 2010-04-12 | 2014-10-28 | Globus Medical, Inc. | Angling inserter tool for expandable vertebral implant |
US8591585B2 (en) | 2010-04-12 | 2013-11-26 | Globus Medical, Inc. | Expandable vertebral implant |
US9301850B2 (en) | 2010-04-12 | 2016-04-05 | Globus Medical, Inc. | Expandable vertebral implant |
US8282683B2 (en) | 2010-04-12 | 2012-10-09 | Globus Medical, Inc. | Expandable vertebral implant |
US8518085B2 (en) | 2010-06-10 | 2013-08-27 | Spartek Medical, Inc. | Adaptive spinal rod and methods for stabilization of the spine |
EP3649937A1 (en) | 2010-12-13 | 2020-05-13 | Statera Spine, Inc. | Methods, systems and devices for clinical data reporting and surgical navigation |
US9925051B2 (en) | 2010-12-16 | 2018-03-27 | Engage Medical Holdings, Llc | Arthroplasty systems and methods |
US8992579B1 (en) | 2011-03-08 | 2015-03-31 | Nuvasive, Inc. | Lateral fixation constructs and related methods |
US8388687B2 (en) | 2011-03-25 | 2013-03-05 | Flexuspine, Inc. | Interbody device insertion systems and methods |
US9017409B2 (en) * | 2011-04-22 | 2015-04-28 | K2M, Inc. | Spinal interbody spacer with semi-constrained screws |
US9333009B2 (en) | 2011-06-03 | 2016-05-10 | K2M, Inc. | Spinal correction system actuators |
US9155580B2 (en) | 2011-08-25 | 2015-10-13 | Medos International Sarl | Multi-threaded cannulated bone anchors |
US8845728B1 (en) | 2011-09-23 | 2014-09-30 | Samy Abdou | Spinal fixation devices and methods of use |
US20140058446A1 (en) * | 2011-09-28 | 2014-02-27 | Avi Bernstein | Spinal implant system |
US9615856B2 (en) | 2011-11-01 | 2017-04-11 | Imds Llc | Sacroiliac fusion cage |
US9254130B2 (en) | 2011-11-01 | 2016-02-09 | Hyun Bae | Blade anchor systems for bone fusion |
US9451987B2 (en) | 2011-11-16 | 2016-09-27 | K2M, Inc. | System and method for spinal correction |
US9468469B2 (en) | 2011-11-16 | 2016-10-18 | K2M, Inc. | Transverse coupler adjuster spinal correction systems and methods |
WO2014172632A2 (en) | 2011-11-16 | 2014-10-23 | Kspine, Inc. | Spinal correction and secondary stabilization |
US9468468B2 (en) | 2011-11-16 | 2016-10-18 | K2M, Inc. | Transverse connector for spinal stabilization system |
US8920472B2 (en) | 2011-11-16 | 2014-12-30 | Kspine, Inc. | Spinal correction and secondary stabilization |
US9526627B2 (en) | 2011-11-17 | 2016-12-27 | Exactech, Inc. | Expandable interbody device system and method |
US8430916B1 (en) | 2012-02-07 | 2013-04-30 | Spartek Medical, Inc. | Spinal rod connectors, methods of use, and spinal prosthesis incorporating spinal rod connectors |
US20130226240A1 (en) | 2012-02-22 | 2013-08-29 | Samy Abdou | Spinous process fixation devices and methods of use |
US9060815B1 (en) | 2012-03-08 | 2015-06-23 | Nuvasive, Inc. | Systems and methods for performing spine surgery |
US10238382B2 (en) | 2012-03-26 | 2019-03-26 | Engage Medical Holdings, Llc | Blade anchor for foot and ankle |
US9198767B2 (en) | 2012-08-28 | 2015-12-01 | Samy Abdou | Devices and methods for spinal stabilization and instrumentation |
US9084642B2 (en) * | 2012-09-12 | 2015-07-21 | Warsaw Orthopedic, Inc. | Spinal implant system and method |
US9320617B2 (en) | 2012-10-22 | 2016-04-26 | Cogent Spine, LLC | Devices and methods for spinal stabilization and instrumentation |
US9492288B2 (en) | 2013-02-20 | 2016-11-15 | Flexuspine, Inc. | Expandable fusion device for positioning between adjacent vertebral bodies |
CA2846149C (en) | 2013-03-14 | 2018-03-20 | Stryker Spine | Systems and methods for percutaneous spinal fusion |
US9827020B2 (en) | 2013-03-14 | 2017-11-28 | Stryker European Holdings I, Llc | Percutaneous spinal cross link system and method |
US9468471B2 (en) | 2013-09-17 | 2016-10-18 | K2M, Inc. | Transverse coupler adjuster spinal correction systems and methods |
US9044273B2 (en) | 2013-10-07 | 2015-06-02 | Intelligent Implant Systems, Llc | Polyaxial plate rod system and surgical procedure |
US9517089B1 (en) | 2013-10-08 | 2016-12-13 | Nuvasive, Inc. | Bone anchor with offset rod connector |
US9408716B1 (en) | 2013-12-06 | 2016-08-09 | Stryker European Holdings I, Llc | Percutaneous posterior spinal fusion implant construction and method |
US10159579B1 (en) | 2013-12-06 | 2018-12-25 | Stryker European Holdings I, Llc | Tubular instruments for percutaneous posterior spinal fusion systems and methods |
US9744050B1 (en) | 2013-12-06 | 2017-08-29 | Stryker European Holdings I, Llc | Compression and distraction system for percutaneous posterior spinal fusion |
US9517144B2 (en) | 2014-04-24 | 2016-12-13 | Exactech, Inc. | Limited profile intervertebral implant with incorporated fastening mechanism |
US10398565B2 (en) | 2014-04-24 | 2019-09-03 | Choice Spine, Llc | Limited profile intervertebral implant with incorporated fastening and locking mechanism |
AU2014306277B2 (en) * | 2014-05-02 | 2017-04-06 | Wright Medical Technology, Inc. | Circular fixator system and method |
EP3229714B1 (en) | 2014-12-09 | 2022-03-02 | Heflin, John, A. | Spine alignment system |
WO2016137983A1 (en) | 2015-02-24 | 2016-09-01 | X-Spine Systems, Inc. | Modular interspinous fixation system with threaded component |
US20160354161A1 (en) | 2015-06-05 | 2016-12-08 | Ortho Kinematics, Inc. | Methods for data processing for intra-operative navigation systems |
US10123829B1 (en) | 2015-06-15 | 2018-11-13 | Nuvasive, Inc. | Reduction instruments and methods |
US10857003B1 (en) | 2015-10-14 | 2020-12-08 | Samy Abdou | Devices and methods for vertebral stabilization |
US10390955B2 (en) | 2016-09-22 | 2019-08-27 | Engage Medical Holdings, Llc | Bone implants |
US10744000B1 (en) | 2016-10-25 | 2020-08-18 | Samy Abdou | Devices and methods for vertebral bone realignment |
US10973648B1 (en) | 2016-10-25 | 2021-04-13 | Samy Abdou | Devices and methods for vertebral bone realignment |
US10456272B2 (en) | 2017-03-03 | 2019-10-29 | Engage Uni Llc | Unicompartmental knee arthroplasty |
US11540928B2 (en) | 2017-03-03 | 2023-01-03 | Engage Uni Llc | Unicompartmental knee arthroplasty |
US11179248B2 (en) | 2018-10-02 | 2021-11-23 | Samy Abdou | Devices and methods for spinal implantation |
US11529173B1 (en) * | 2021-11-12 | 2022-12-20 | Spinal Simplicity, Llc | Reduction system for spondylolisthesis |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1025008A (en) * | 1911-08-07 | 1912-04-30 | Lucien Luttrell Miner | Brace for fractured bones. |
US1789060A (en) * | 1928-09-29 | 1931-01-13 | King Scheerer Corp | Bone-fracture clamp |
US3244170A (en) * | 1962-11-23 | 1966-04-05 | Robert T Mcelvenny | Compression type bone splint |
US3426364A (en) * | 1966-08-25 | 1969-02-11 | Colorado State Univ Research F | Prosthetic appliance for replacing one or more natural vertebrae |
US3659595A (en) * | 1969-10-22 | 1972-05-02 | Edward J Haboush | Compensating plates for bone fractures |
US3648691A (en) * | 1970-02-24 | 1972-03-14 | Univ Colorado State Res Found | Method of applying vertebral appliance |
US3693616A (en) * | 1970-06-26 | 1972-09-26 | Robert Roaf | Device for correcting scoliotic curves |
GB1519139A (en) * | 1974-06-18 | 1978-07-26 | Crock H V And Pericic L | L securing elongate members to structurs more especially in surgical procedures |
GB1571713A (en) * | 1976-04-21 | 1980-07-16 | Gil J L | Apparatus for use in the treatment of bone fractures |
CH615821A5 (en) * | 1976-05-31 | 1980-02-29 | Giulio Gentile | |
CH613858A5 (en) * | 1977-04-22 | 1979-10-31 | Straumann Inst Ag | |
CH651192A5 (en) * | 1980-11-20 | 1985-09-13 | Synthes Ag | OSTEOSYNTHETIC DEVICE AND CORRESPONDING DRILL GAUGE. |
US4456005A (en) * | 1982-09-30 | 1984-06-26 | Lichty Terry K | External compression bone fixation device |
-
1983
- 1983-12-16 US US06/562,438 patent/US4611581A/en not_active Expired - Lifetime
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1984
- 1984-07-18 CA CA000459110A patent/CA1224990A/en not_active Expired
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US4611581A (en) | 1986-09-16 |
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