CA2341305A1 - Bone-anchoring element with snap-in spherical head - Google Patents

Bone-anchoring element with snap-in spherical head Download PDF

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Publication number
CA2341305A1
CA2341305A1 CA002341305A CA2341305A CA2341305A1 CA 2341305 A1 CA2341305 A1 CA 2341305A1 CA 002341305 A CA002341305 A CA 002341305A CA 2341305 A CA2341305 A CA 2341305A CA 2341305 A1 CA2341305 A1 CA 2341305A1
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Canada
Prior art keywords
bone
anchoring assembly
anchoring
connector
central axis
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Abandoned
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CA002341305A
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French (fr)
Inventor
Beatrice Steiner
Max Aebi
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Synthes USA LLC
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Individual
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Filing date
Publication date
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Publication of CA2341305A1 publication Critical patent/CA2341305A1/en
Abandoned legal-status Critical Current

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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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
    • A61B17/8038—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers the additional component being inserted in the screw head
    • 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
    • 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
    • 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
    • A61B17/701—Longitudinal elements with a non-circular, e.g. rectangular, cross-section
    • 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
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/8635—Tips of screws
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated

Abstract

The invention relates to a bone-anchoring element (1) comprising A) a cylindrical or conical shaft (3) which can be implanted in a bone and has a central axis (2), an upper end (10) and a lower end (11); and B) a spherical connecting element (6) which is mounted at the upper end (10) concentrically to the central axis (2) and can be introduced into a corresponding hollow space of an implant; where C) the connecting element (6) can be elastically compressed or expanded radially to the central axis (2) and in this way can removably snap into the hollow chamber of the implant and be housed therein in a pivoting manner; and D) the connecting element (6) comprises means (12) for the expansion of said element (6) so that it can be blocked in relation to the hollow space after insertion into same. The invention also relates to a bone-fixing device comprising two bone-anchoring elements (1) which A) comprise at least one plate (21; 22) which has a central axis (30), an upper cover surface (16) and a lower cover surface (18) as well as a thickness X and is provided with means (19) for receiving the connecting elements (6) of the two bone-anchoring elements (1); and B) means (24) for fixing the bone-anchoring elements (1) in the at least one plate (21; 22), where C) the two bone-anchoring elements (1) can be displaced in the direction of the central axis (30).

Description

m ,~ 1 1691 / PCT
A BONE-ANCHORING ASSEMBLY WITH
SNAP-IN BALLHEAD.
The invention relates to a bone-anchoring assembly as defined in the preamble of claim 1 and to bone-affixing apparatus as defined in the preamble of claim 20.
' As regards the fixation of bone parts or in particular vertebral affixation, the bone parts or the vertebras are affixed by bone screws, pedicle screws or other bone anchoring elements to internal plates or bars.
1o An implant for relative affixation of bone parts or also for vertebral affixation is disclosed in the German document 297 10 970 AESCULAP. The implant comprises anchoring elements affixable by a detachable ball clamp, connectors and longitudinal supports which also are clamped to the connectors and by means of which several anchoring elements inserted into various bone parts or also vertebras can be rigidly joined. The anchoring elements are hollow-cylindrical bone screws and are fitted on the outside surface with a thread and furthermore with radial passages between the threads. A receiving duct must be drilled or milled before these hollow-cylindrical anchoring elements are inserted into the bone. In this known implant, a bearing, for instance in the form of a bone plate, and the bone screw are coupled by a ball joint.
2o The ball joint allows pivotably supporting the bone screw until the joint is locked by a clamping element. However the dish-shaped seat of the ballhead of the bone screw only allows inserting the bone screw unilaterally from above into the bearing and as a result the bone screw and the bearing must be screwed jointly into the bone.
The objective of the invention is palliation. Its purpose is to design a bone anchoring assembly having a connector into a further osteosynthetic implant in such manner that the nature of the connector allows reversible snap-in at a corresponding 28.12.2000 . 2 English translation of the amendments as annexed to the International Preliminary Examination Report of the International Patent Application PCT/CH98100360 "Bone-anchoring element with snap-in spherical head" in the name of Synthes AG Chur radial passages between the threads. A receiving duct must be drilled or milled before these hollow-cylindrical anchoring elements are inserted into the bone. In this known implant, a bearing, for instance in the form of a bone plate, and the bone screw are coupled by a ball joint. The ball joint allows pivotably supporting the bone screw until the joint is locked by a clamping element. However the dish-shaped seat of the ballhead of the bone screw only allows inserting the bone screw unilaterally from above into the bearing and as a result the bone screw and the bearing must be screwed jointly into the bone.
Another osteosynthetic device with a plate and several bone anchoring elements that are connectable with the plate is disclosed in WO 96/08206 FOLEY. These known bone anchoring elements consist of bone screws having a spherical and radially elastic screw head. By means of a conical fixation screw which is axially screwable in a corresponding conical opening with subsequent interior thread the spherical screw head of the bone screw is radially expanded and such fastened iri a corresponding opening within the bone plate.
Still another osteosynthetic device with a plate and several bone screws connectable with the plate is disclosed in WO 88/03781 RAVEH. These known bone screws comprise spherical and radially elastically expandable screw heads which are fastenable within the plates by means of conical insert screws that are screwable into complementary internal threads within the screw heads.
Yet, another device to the fixation of a plate at a bone by means of severa I
attachment means is disclosed in EP 0 809 975 BENZEL. These known attachment means comprise dowels that are screwable into the bone and have radially elastically expandable spherical heads. To fasten the dowels in the bone expansion screws with conical screw heads are screwed into the dowels, 2a such that the spherical heads are fastenable within the corresponding openings of the plate by means of the conical screw heads and furthermore, the dowels are expanded within the bone through the shafts of the expansion screws.
The objective of the invention is palliation. Its purpose is to design a bone anchoring assembly having a connector into a further osteosynthetic implant in such manner that the nature of the connector allows reversible snap-in at a corresponding cavity in the further osteosynthetic implant and to allow pivotable support therein.
Preferably the further osteosynthetic implant is a bone implant or a jaw, illustratively making possible connection to (also implantable) bars.

3 1691 / PCf assembly can be affixed relative to the further implant. These means comprise a borehole entering the connector at the end face. The borehole is fitted in the part of the connector pointing to the end face with a comically lathed surface. This lathed surface tapers from the end face toward the inside of the connecter as far as a specified depth at which the comically lathed surface terminates while forming a shoulder relative to the borehole. In the adjoining part, the borehole comprises an inside thread permitting screwing-in a tensioning screw having a conical screw head corresponding to the lathed surface. The cone angle of the screwheads is not mandatorily the same as that of the lathed surface.
1o In the direction of the central axis, the shank of the bone anchoring assembly is of a height H and it is furthermore fitted with a borehole concentric with the central axis that is of a depth T < H starting at the lower end opposite the connector. The outside surface of the shank is fitted with an external thread but, over a part-length W measured from the lower end, amounting to 50 to 80 % of the height H, it is a smooth surface. The shank sidewall over this part length is hollow-cylindrical and perforated by radial passages. These passages allow fusing the bone externally resting against the implanted shank with the ossification center inside the implanted shank. Advantageous the external thread is self forming.
The lower shank end opposite the connector is fitted at its end face with 2o tangential cutting teeth which endow the bone anchoring assembly with a self cutting feature.
In its preferred embodiment, the apparatus of the invention used in bone fixation comprises two of the above described bone-anchoring assemblies, two plates, means to affix one each of the bone anchoring assemblies in each of these plates and a fastener to affix the two plates relative to each other. There is a common longitudinal axis for the plates and each is fitted with a lower and upper overlap surface. Each plate comprises means to receive a connector mounted to the bone-anchoring assemblies. In the vicinity of these means, the plate thickness is X.
The plates mutually overlap over part of their length along the longitudinal axis. In that part the plate thickness is reduced to X/2. One of the plates comprises at its top surface a continuous area as far as its region of thickness X, whereas the other plate at its lower overlap surface comprises a continuous surface to its area of thickness X. In this manner the parts of the plates of reduced thickness can be moved one over the other in such manner that the two inserted connectors of the 1o bone-anchoring assemblies are located in the same plane. Moreover the bone-anchoring assemblies are mutually displaceable on account of the plates being displaceable along their longitudinal axis over a distance Z relative to each other. The distance Z amounts to 20 to 60 mm, preferably 30 to 50 mm.
The means in the plates to receive the spherical connectors are in the form of spherical-segment cavities and in such a way that the connectors can snap into the cavities. On account of this design of the cavities in the plates, the connectors , which are also in the form of spherical segments, inserted into said cavities also are pivotably supported. The pivoting motion so achieved of the central axes of the bone-anchoring assemblies relative to the perpendicular to the lower plate surfaces 2o encompasses an angular range of 15 to 25°. The spherical-segment cavities in the plates are designed in such manner that the equatorial plane orthogonal to the central axis is a distance Y < X from the top surface, where this distance Y
advantageously is 50 to 75 % of the plate thickness X.
~rther advantageous embodiments of the invention are characterized in the dependent claims.

.. s 1691 / PCT
Essentially the advantages offered by the invention are that thanks to the spherical and elastically deforming connector of the invention the bone-anchoring assembly can be connected in simple, displaceable manner with the plate by snapping the connector into the cavity of the bone plate. Moreover the bone-anchoring s assembly can be pivoted relative to the plate and be affixed in an adjusted position.
The invention and its further embodiments are elucidated below in relation to the partly schematic Figures of an illustrative embodiment.
Fig. 1 is an elevation of an embodiment of the bone-anchoring assembly of the invention, 1o Fig. 2 is a topview of the embodiment of Fig. l of the bone-anchoring assembly of the invention, ,, Fig. 3 is a detail of embodiment shown in Figs. 1 and 2 of the bone-anchoring assembly of the invention with a connecting plate, is and Fig. 4 is an elevation of an embodiment of the apparatus of the invention, Fig. 5 is a topview of the embodiment of the invention shown in Fig. 4.
Figs. 1 and 2 show an embodiment of the bone-anchoring assembly 1 of the invention. This assembly comprises a hollow-cylindrical shank 3 of central axis 2~, a lower end 11 and an upper end 10. A spherical connector 6 is mounted 2o concentrically with the central axis 2 at the upper end 10 of the shank 3.
Because of the design of the spherical connector 6 having resilient blades 14 in the radial direction to the central axis 2, the connector 6 is endowed with elasticity.
The blades 14 are formed by means of slits 7 running parallel to the central axis 2 and passing through the spherical connector 6 at a depth deeper than the equatorial plane 2s perpendicular to the central axis 2. The depth of penetration of the slits 7 from the .- 6 1691 / PCf end face 15 of the connector 6 is limited by boreholes 8 running radially to the central axis 2. In its external shape, the connector 6 is a spherical segment of spherical diameter D and segment thickness U. The ratio U/D of the segment thickness to spherical diameter D in this instance is 58%. Between the spherical-segment connector 6 and the upper end 10 of the shank 3, a semi-circular lathed surface 9 is present. Moreover means 12; 13; 34 are present at the connector 6 to allow its expansion. These means 12; 13; 14 include a borehole 34 entering the connector from the end face 15. The borehole 34 comprises a conically lathed surface 13 in the part of the connector 6 which points to the end face 15. This lathed surface 13 tapers 1o from the end face 15 in the direction of the inside of the connector 6 as far as a specified depth at which this conically lathed surface 13 terminates forming a shoulder 36 relative to the borehole 34. In the adjoining part, the borehole 34 is fitted with an inside thread 42 making possible screwing-in a tightening screw having a conical screw head corresponding to the lathing 13.
In the direction toward the central axis 2, the shank 3 of the bone-anchoring assembly 1 is of height H and is fitted with a borehole 5 of a depth T < Y
running from the lower end 11 opposite the connector 6. The outside surface 35 of the shank 3 is fitted with an external thread.
At its upper end 10, the shank 3 is fitted with a flange 39 of a diameter larger 2o than that of the shank 3. This flange 39 is fitted with six semi-circular notches 40 equidistant by 60°. Using these notches 40 and a matching tool, the bone-anchoring assembly 1 can be rotated into the bone. However, instead of the notches 40, the flange 39 also might be in the form of an external hexagon. The flange 39 furthermore ensures that the bone-anchoring assembly 1 can not be screwed unduly deep into the bone or the vertebra.

In Fig. 3, the means 19 fitted into the plates and receiving the spherical connectors 6 are shown in the form of part of a plate 21. The means 19 are a cavity assuming the shape of a spherical segment, as a result of which the connectors 6 can be snapped into the cavities. The spherical-segment cavities in the plates 21 are designed in such manner that the equatorial plane 1? orthogonal to the central axis 2 is a distance Y < X from the top surface 16 of the plate 21, in this instance the distance Y being 63.3 % of the thickness X of the plates 21.
Figs. 4 and 5 show a variant of the bone-affixing apparatus of the invention, this variant comprising two of the above described bone-anchoring assemblies 1, two to plates 21; 22, means 24 to affix one bone-anchoring assembly 1 in each of these two plates 21; 22 and a fastener 27 to affix the plates 21; 22 relative to each other. The mean$ 19 receiving the connectors 6 in the plates 21; 22 again are spherical boreholes. In this case the means 24 affixing the bone-anchoring assemblies 1 to the plates 21; 22 consist of screws having a conical screw head. The lathings 13 at the connectors 6 seat conical screw heads of the screw 23. When the screws 23 are tightened, the conical screwheads also clamp the connectors 6 fitted with slits 7 and a conically lathed surface 13 against the wall of the spherical boreholes searing as the means 19 receiving the connectors 6. As a result the bone-anchoring assembly 1 can be fixed in place relative to the perpendicular to the plate 21; 22 and in it at a pivoted 2o angle of 20°. The fastener 27 again is a screw inserted into a borehole with a thread 37 in one of the plates (22). The other plate (21) is fitted with an elongated slot 38 which is crossed by the fastener 27. The elongated slot 38 allows mutually shifting the plates 21; 22. The two plates 21; 22 overlap at mutually contacting surfaces 25 26 extending along the longitudinal axis 30. These two mutually contacting surfaces are fitted with serrations 28 to prevent the plates 21; 22 from slipping under load.

.. 8 1691 / PC1' Furthermore the two plates 21; 22 are fitted at their mutually opposite ends with projecting lugs 41 present laterally at the plates 21; 22. These lugs prevent mutual rotation of the plates 21; 22 which would degrade their alignment with the longitudinal axis 30.
The plates 21; 22 have a common longitudinal axis 30, and each has a lower and an upper overlap surface 16; 18. The plates 21; 22 are of a thickness X in the vicinity of the means 19, in the form of spherical cavities, seating the connectors 6.
The plates 21; 22 overlap over part of their length along the longitudinal axis 30. On this part the thickness of the plates 21; 22 is reduced to X/2. One of the 1o plates 22 comprises at its top overlap surface 16 a continuous area toward its zone which is of thickness X, whereas the other plate 21 comprises at its lower overlap surface 18 a continuous area to its zone of thickness X. In this manner the bone anchoring assemblies 1 can be shifted by a distance Z relative to each other on account of the displaceability of the plates 21; 22 along the longitudinal axis 30.
The outside surface 35 of the shank 3 is fitted with an external thread 4 and is smooth over a part-length W measured from its lower end 11. The sidewall of the shank 3 is hollow-cylindrical over this part-length and perforated by radial apertures 31. Advantageously the external thread 4 is self forming.
The lower end 11 of the shank 3 opposite the connector 6 is fitted at its end 2o face with tangential cutting teeth 32.
Because of the geometry of the cavities 19 in the plates 21; 22, the equally spherical-segment connectors 6 inserted in them are supported in pivotable manner.
The pivotability so achieved of the central axes 2 of the bone-anchoring assemblies 1 relative to the perpendicular to the lower overlap surface of the plates 21;

subtends an angle 29 which is 16 ° on the inside and 19 ° on the outside.

9 1691 / PG"C
Insertion of the above described implant does not require prior making of a receiving duct in the bone. Before the bone-anchoring assembly 1 is inserted into the bone, a Kirschner wire is first concentrically inserted into the bone. Next the bone-anchoring assembly 1 is directly rotated into the bone or also the vertebra using a wrench which snaps into the ballhead of the connector 6 and which externally engages the six notches 40. The wrench is fitted with a borehole and is guided in this manner by the previously inserted Kirschner wire. The duct to seat the hollow-cylindrical shank 3 is milled out of the bone by the cutting teeth 31. The bone chips so produced are evacuated into the inside of the hollow-cylindrical shank 3.
Once the 1o bone-anchoring assembly 1 has been screwed-in, the Kirschner wire can be removed.
The second bone-anchoring assembly 1 can be inserted into the bone in the same mailer. After the bone-anchoring assemblies have been inserted into the bone or the vertebra, the plates 21; 22 are set on the connectors 6, the bullheads of the connectors 6 in this process snapping into the spherical boreholes in the plates 21;
22. By screwing-in and tightening the screws 23 and the tightening screw 27, the entire implant can be locked in a desired position.

Claims (29)

1. A bone-anchoring assembly (1) comprising:
(a) a cylindrical or conical shank (3) implantable in a bone and having a longitudinal axis (2), an upper end (10) and a lower end (11), and (b) a spherical connector (6) mounted at the upper end (10) concentrically to the central axis (2) and insertable into a corresponding cavity of an implant or an osteosynthetic implant, whereby (c) the connector (6) is elastically compressible or expansible radially to the central axis (2) and thereby can be reversibly snapped into and out of the cavity of the implant or osteosynthetic implant and can be received therein in pivotable manner, and (d) the connector (6) comprises means to expand the connector (6) in order to lock it in place relative to the cavity after it has been inserted into this cavity, characterized in that (e) the shank (3) is self-cutting at the lower end (11).
2. Bone-anchoring assembly (1) as claimed in claim 1, characterized in that the connector (6) assumes the shape of a spherical segment of spherical diameter D
and segment height U.
3. Bone-anchoring assembly (1) as claimed in either of claims 1 and 2, characterized in that the spherical connector (6) consists of blades (14) which are radially inwardly and outwardly resilient relative to the central axis (2).
4. Bone-anchoring assembly (1) as claimed in one of claims 1 through 3, characterized in that the means (12) comprise a borehole (34) running concentrically with the central axis (2) from the end face (15) of the connector (6).
5. Bone-anchoring assembly (1) as claimed in claim 4, characterized in that the borehole (34) is fitted with an inside thread (42).
6. Bone-anchoring assembly (1) as claimed in either of claims 4 and 5, characterized in that the borehole (34) conically tapers from the end face (15) over part of its length toward the upper end (10) of the shank (3).
7. Bone-anchoring assembly (1) as claimed in one of claims 2 through 6, characterized in that the ratio U/D of spherical segment U to spherical diameter D is between 40 and 70 %.
8. Bone-anchoring assembly (1) as claimed in one of claims 1 through 7, characterized in that the shank (3) is in the form of a cylindrical screw with an external thread (4).
9. Bone-anchoring assembly (1) as claimed in one of claims 1 through 7, characterized in that the shank (3) assumes the shape of a conical screw tapering toward the lower end (11) and fitted with an external thread (4).
10. Bone-anchoring assembly (1) as claimed in one of claims 1 through 7, characterized in that the shank (3) is in the form of a hollow-cylindrical screw fitted with an external thread (4).
11. Bone-anchoring assembly (1) as claimed in one of claims 2 through 10, characterized in that the spherical segment at the connector (6) is symmetrical relative to the equatorial plane orthogonal to the central axis (2).
12. Bone-anchoring assembly (1) as claimed in one of claims 3 through 11, characterized in that the blades (14) allow elastically deforming the spherical connector (6) in the radial direction to the central axis (2), whereby the spherical diameter D of the connector (6) is elastically variable in the equatorial plane orthogonal to the central axis (2) in a range between 0.95 D and 1.05 D.
13. Bone-anchoring assembly (1) as claimed in one of claims 1 through 12, characterized in that in the direction of the central axis (2), the shank (3) is of height H and comprises a borehole (5) concentric with the central axis (2) and of a depth T
< H from the lower end (11).
14. Bone-anchoring assembly (1) as claimed in one of claims 1 through 13, characterized in that at the lower end (11) of the shank (3) cutting teeth (31) are present.
15. Bone-anchoring assembly (1) as claimed in one of claims 1 through 14, characterized in that the outside surface (35) of the shank (3) comprises a smooth area over a part-length W < H from the lower end (11).
16. Bone-anchoring assembly (1) as claimed in claim 15, characterized in that the part-length W is between 50 % and 80 % of the height H.
17. Bone-anchoring assembly (1) as claimed in one of claims 14 through 16, characterized in that tangential cutting teeth (31) are present at the end face of the lower end (11) of the shank (3).
18. Bone-anchoring assembly (1) as claimed in one of claims 8 through 17, characterized in that the thread (4) is self forming.
19. Bone-anchoring assembly (1) as claimed in one of claims 13 through 18, characterized in that the hollow-cylindrical sidewall of the shank (3) is fitted with radial passages (31).
20. Apparatus for bone fixation having two bone-anchoring assemblies (1) defined in one of claims 1 through 19, characterized in that it comprises (a) at least one plate (21; 22) having a longitudinal axis (30), an upper overlap surface (16) and a lower overlap surface (18), where this at least one plate (21; 22) is of thickness X and is fitted with means (19) to receive the connectors (6) of the two bone-anchoring assemblies (1), and (b) means (24) to affix the bone-anchoring assemblies (1) in the at least one plate (21;
22), where (c) the two bone-anchoring assemblies (1) are displaceable in the direction of the longitudinal axis (30).
21. Apparatus as claimed in claim 20, characterized in that it comprises two plates (21; 22) displaceable in the direction of the longitudinal axis (30), each of the two plates (21; 22) being fitted with means (19) to receive one connector (6), further comprising a fastener (27) to affix the two plates (21; 22) relative to each other.
22. Apparatus as claimed in either of claims 20 and 21, characterized in that the two bone-anchoring assemblies (1) are displaceable along the longitudinal axis (30) by a mutual distance Z.
23. Apparatus as claimed in claim 22, characterized in that the distance Z is between 20 and 60 mm.
24. Apparatus as claimed in claim 23, characterized the distance Z is between 30 and 50 mm.
25. Apparatus as claimed in one of claims 20 through 24, characterized in that the two plates (21; 22) are fitted with a serration (28) at the surfaces (25;
26) in mutual contact.
26. Apparatus as claimed in one of claims 20 through 25, characterized in that the central axes (2) of the bone-anchoring assemblies (1) are pivotable by an angle (29) between 15° and 25° relative to the perpendicular to the lower overlap surface (18) of the at least one plate (21; 22).
27. Apparatus as claimed in one of claims 20 through 26, characterized in that the means (19) receiving the connectors (6) are spherical-segment cavities.
28. Apparatus as claimed in claim 27, characterized in that the equatorial plane (17) of the spherical-segment cavities and orthogonal to the central axis (2) is a distance Y < X from the upper overlap surface (16) within the plate (21;
22).
29. Apparatus as claimed in claim 28, characterized the distance Y is between 50 % and 75 % of the thickness X.
CA002341305A 1998-08-21 1998-08-21 Bone-anchoring element with snap-in spherical head Abandoned CA2341305A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1998/000360 WO2000010474A1 (en) 1998-08-21 1998-08-21 Bone-anchoring element with snap-in spherical head

Publications (1)

Publication Number Publication Date
CA2341305A1 true CA2341305A1 (en) 2000-03-02

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ID=4551345

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Application Number Title Priority Date Filing Date
CA002341305A Abandoned CA2341305A1 (en) 1998-08-21 1998-08-21 Bone-anchoring element with snap-in spherical head

Country Status (7)

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US (1) US6508818B2 (en)
EP (1) EP1105059A1 (en)
JP (1) JP2002523129A (en)
AU (1) AU747042B2 (en)
CA (1) CA2341305A1 (en)
WO (1) WO2000010474A1 (en)
ZA (1) ZA994847B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9480510B2 (en) 2011-03-23 2016-11-01 Spinecraft, LLC Devices, systems and methods of attaching same to the spine

Families Citing this family (160)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK1105058T3 (en) * 1998-08-21 2002-10-14 Synthes Ag Self-cutting hollow cylindrical bone anchoring element
AR027685A1 (en) * 2000-03-22 2003-04-09 Synthes Ag METHOD AND METHOD FOR CARRYING OUT
US7833250B2 (en) 2004-11-10 2010-11-16 Jackson Roger P Polyaxial bone screw with helically wound capture connection
US6726689B2 (en) * 2002-09-06 2004-04-27 Roger P. Jackson Helical interlocking mating guide and advancement structure
US8377100B2 (en) * 2000-12-08 2013-02-19 Roger P. Jackson Closure for open-headed medical implant
US10729469B2 (en) 2006-01-09 2020-08-04 Roger P. Jackson Flexible spinal stabilization assembly with spacer having off-axis core member
US10258382B2 (en) * 2007-01-18 2019-04-16 Roger P. Jackson Rod-cord dynamic connection assemblies with slidable bone anchor attachment members along the cord
US8353932B2 (en) 2005-09-30 2013-01-15 Jackson Roger P Polyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member
US8292926B2 (en) * 2005-09-30 2012-10-23 Jackson Roger P Dynamic stabilization connecting member with elastic core and outer sleeve
US7862587B2 (en) 2004-02-27 2011-01-04 Jackson Roger P Dynamic stabilization assemblies, tool set and method
US7766947B2 (en) 2001-10-31 2010-08-03 Ortho Development Corporation Cervical plate for stabilizing the human spine
US8876868B2 (en) 2002-09-06 2014-11-04 Roger P. Jackson Helical guide and advancement flange with radially loaded lip
US20060009773A1 (en) * 2002-09-06 2006-01-12 Jackson Roger P Helical interlocking mating guide and advancement structure
US8282673B2 (en) 2002-09-06 2012-10-09 Jackson Roger P Anti-splay medical implant closure with multi-surface removal aperture
US8257402B2 (en) * 2002-09-06 2012-09-04 Jackson Roger P Closure for rod receiving orthopedic implant having left handed thread removal
US20060200128A1 (en) * 2003-04-04 2006-09-07 Richard Mueller Bone anchor
US8540753B2 (en) 2003-04-09 2013-09-24 Roger P. Jackson Polyaxial bone screw with uploaded threaded shank and method of assembly and use
US7621918B2 (en) 2004-11-23 2009-11-24 Jackson Roger P Spinal fixation tool set and method
US6716214B1 (en) * 2003-06-18 2004-04-06 Roger P. Jackson Polyaxial bone screw with spline capture connection
BRPI0410697A (en) 2003-05-02 2006-06-20 Univ Yale dynamic spine stabilizer and method
US7615068B2 (en) * 2003-05-02 2009-11-10 Applied Spine Technologies, Inc. Mounting mechanisms for pedicle screws and related assemblies
US7635379B2 (en) * 2003-05-02 2009-12-22 Applied Spine Technologies, Inc. Pedicle screw assembly with bearing surfaces
US8652175B2 (en) * 2003-05-02 2014-02-18 Rachiotek, Llc Surgical implant devices and systems including a sheath member
US7713287B2 (en) * 2003-05-02 2010-05-11 Applied Spine Technologies, Inc. Dynamic spine stabilizer
US20050171543A1 (en) * 2003-05-02 2005-08-04 Timm Jens P. Spine stabilization systems and associated devices, assemblies and methods
US20050182401A1 (en) * 2003-05-02 2005-08-18 Timm Jens P. Systems and methods for spine stabilization including a dynamic junction
US20050177164A1 (en) * 2003-05-02 2005-08-11 Carmen Walters Pedicle screw devices, systems and methods having a preloaded set screw
US7377923B2 (en) 2003-05-22 2008-05-27 Alphatec Spine, Inc. Variable angle spinal screw assembly
US8137386B2 (en) 2003-08-28 2012-03-20 Jackson Roger P Polyaxial bone screw apparatus
US8366753B2 (en) * 2003-06-18 2013-02-05 Jackson Roger P Polyaxial bone screw assembly with fixed retaining structure
US7776067B2 (en) 2005-05-27 2010-08-17 Jackson Roger P Polyaxial bone screw with shank articulation pressure insert and method
US8398682B2 (en) * 2003-06-18 2013-03-19 Roger P. Jackson Polyaxial bone screw assembly
US8092500B2 (en) * 2007-05-01 2012-01-10 Jackson Roger P Dynamic stabilization connecting member with floating core, compression spacer and over-mold
US8257398B2 (en) * 2003-06-18 2012-09-04 Jackson Roger P Polyaxial bone screw with cam capture
US20100211114A1 (en) * 2003-06-18 2010-08-19 Jackson Roger P Polyaxial bone anchor with shelf capture connection
US8814911B2 (en) * 2003-06-18 2014-08-26 Roger P. Jackson Polyaxial bone screw with cam connection and lock and release insert
US8377102B2 (en) 2003-06-18 2013-02-19 Roger P. Jackson Polyaxial bone anchor with spline capture connection and lower pressure insert
US8926670B2 (en) 2003-06-18 2015-01-06 Roger P. Jackson Polyaxial bone screw assembly
US7766915B2 (en) * 2004-02-27 2010-08-03 Jackson Roger P Dynamic fixation assemblies with inner core and outer coil-like member
US7967850B2 (en) 2003-06-18 2011-06-28 Jackson Roger P Polyaxial bone anchor with helical capture connection, insert and dual locking assembly
US7179261B2 (en) 2003-12-16 2007-02-20 Depuy Spine, Inc. Percutaneous access devices and bone anchor assemblies
US11419642B2 (en) 2003-12-16 2022-08-23 Medos International Sarl Percutaneous access devices and bone anchor assemblies
US7527638B2 (en) 2003-12-16 2009-05-05 Depuy Spine, Inc. Methods and devices for minimally invasive spinal fixation element placement
US7621938B2 (en) * 2004-01-15 2009-11-24 Warsaw Orthopedic, Inc. Spinal implant construct and method for implantation
AU2004317551B2 (en) 2004-02-27 2008-12-04 Roger P. Jackson Orthopedic implant rod reduction tool set and method
US7160300B2 (en) 2004-02-27 2007-01-09 Jackson Roger P Orthopedic implant rod reduction tool set and method
US8152810B2 (en) 2004-11-23 2012-04-10 Jackson Roger P Spinal fixation tool set and method
CN101090675A (en) * 2004-06-23 2007-12-19 应用脊柱外科技术公司 Systems and methods for spine stabilization
US7651502B2 (en) 2004-09-24 2010-01-26 Jackson Roger P Spinal fixation tool set and method for rod reduction and fastener insertion
CA2586361A1 (en) 2004-11-10 2006-05-18 Roger P. Jackson Helical guide and advancement flange with break-off extensions
US8926672B2 (en) 2004-11-10 2015-01-06 Roger P. Jackson Splay control closure for open bone anchor
US8308782B2 (en) 2004-11-23 2012-11-13 Jackson Roger P Bone anchors with longitudinal connecting member engaging inserts and closures for fixation and optional angulation
US9168069B2 (en) 2009-06-15 2015-10-27 Roger P. Jackson Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer
US9980753B2 (en) 2009-06-15 2018-05-29 Roger P Jackson pivotal anchor with snap-in-place insert having rotation blocking extensions
WO2006057837A1 (en) 2004-11-23 2006-06-01 Jackson Roger P Spinal fixation tool attachment structure
US7875065B2 (en) * 2004-11-23 2011-01-25 Jackson Roger P Polyaxial bone screw with multi-part shank retainer and pressure insert
US8444681B2 (en) 2009-06-15 2013-05-21 Roger P. Jackson Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US9216041B2 (en) 2009-06-15 2015-12-22 Roger P. Jackson Spinal connecting members with tensioned cords and rigid sleeves for engaging compression inserts
EP1814474B1 (en) 2004-11-24 2011-09-14 Samy Abdou Devices for inter-vertebral orthopedic device placement
US7736380B2 (en) * 2004-12-21 2010-06-15 Rhausler, Inc. Cervical plate system
US20060229613A1 (en) * 2004-12-31 2006-10-12 Timm Jens P Sheath assembly for spinal stabilization device
US7476239B2 (en) * 2005-05-10 2009-01-13 Jackson Roger P Polyaxial bone screw with compound articulation
US7901437B2 (en) 2007-01-26 2011-03-08 Jackson Roger P Dynamic stabilization member with molded connection
US10076361B2 (en) 2005-02-22 2018-09-18 Roger P. Jackson Polyaxial bone screw with spherical capture, compression and alignment and retention structures
AU2020257035B2 (en) * 2005-03-17 2021-12-23 Spinal Elements, Inc. Implant system for treating the spine
US8470039B2 (en) 2005-03-17 2013-06-25 Spinal Elements, Inc. Flanged interbody fusion device with fastener insert and retaining ring
WO2006116606A2 (en) 2005-04-27 2006-11-02 James Marino Mono-planar pedilcle screw method, system, and kit
US7811309B2 (en) * 2005-07-26 2010-10-12 Applied Spine Technologies, Inc. Dynamic spine stabilization device with travel-limiting functionality
US7699875B2 (en) * 2006-04-17 2010-04-20 Applied Spine Technologies, Inc. Spinal stabilization device with weld cap
US7713288B2 (en) * 2005-08-03 2010-05-11 Applied Spine Technologies, Inc. Spring junction and assembly methods for spinal device
US8105368B2 (en) 2005-09-30 2012-01-31 Jackson Roger P Dynamic stabilization connecting member with slitted core and outer sleeve
US20070093813A1 (en) * 2005-10-11 2007-04-26 Callahan Ronald Ii Dynamic spinal stabilizer
US20070093815A1 (en) * 2005-10-11 2007-04-26 Callahan Ronald Ii Dynamic spinal stabilizer
US20070093814A1 (en) * 2005-10-11 2007-04-26 Callahan Ronald Ii Dynamic spinal stabilization systems
US7704271B2 (en) * 2005-12-19 2010-04-27 Abdou M Samy Devices and methods for inter-vertebral orthopedic device placement
US20080294198A1 (en) * 2006-01-09 2008-11-27 Jackson Roger P Dynamic spinal stabilization assembly with torsion and shear control
US7695473B2 (en) * 2006-01-18 2010-04-13 Biodynamics Llc Adjustable bone plate
US20080147122A1 (en) * 2006-10-12 2008-06-19 Jackson Roger P Dynamic stabilization connecting member with molded inner segment and surrounding external elastomer
AU2007332794C1 (en) 2006-12-08 2012-01-12 Roger P. Jackson Tool system for dynamic spinal implants
US9039768B2 (en) 2006-12-22 2015-05-26 Medos International Sarl Composite vertebral spacers and instrument
US8475498B2 (en) 2007-01-18 2013-07-02 Roger P. Jackson Dynamic stabilization connecting member with cord connection
US8366745B2 (en) 2007-05-01 2013-02-05 Jackson Roger P Dynamic stabilization assembly having pre-compressed spacers with differential displacements
US8012177B2 (en) 2007-02-12 2011-09-06 Jackson Roger P Dynamic stabilization assembly with frusto-conical connection
US10383660B2 (en) 2007-05-01 2019-08-20 Roger P. Jackson Soft stabilization assemblies with pretensioned cords
US8197518B2 (en) 2007-05-16 2012-06-12 Ortho Innovations, Llc Thread-thru polyaxial pedicle screw system
US7942910B2 (en) 2007-05-16 2011-05-17 Ortho Innovations, Llc Polyaxial bone screw
US7942911B2 (en) 2007-05-16 2011-05-17 Ortho Innovations, Llc Polyaxial bone screw
US7947065B2 (en) * 2008-11-14 2011-05-24 Ortho Innovations, Llc Locking polyaxial ball and socket fastener
US7951173B2 (en) * 2007-05-16 2011-05-31 Ortho Innovations, Llc Pedicle screw implant system
US7942909B2 (en) 2009-08-13 2011-05-17 Ortho Innovations, Llc Thread-thru polyaxial pedicle screw system
CA2690038C (en) * 2007-05-31 2012-11-27 Roger P. Jackson Dynamic stabilization connecting member with pre-tensioned solid core
US8911477B2 (en) * 2007-10-23 2014-12-16 Roger P. Jackson Dynamic stabilization member with end plate support and cable core extension
US20090105764A1 (en) * 2007-10-23 2009-04-23 Jackson Roger P Dynamic stabilization member with fin support and solid core extension
US20090248092A1 (en) 2008-03-26 2009-10-01 Jonathan Bellas Posterior Intervertebral Disc Inserter and Expansion Techniques
FR2929106A1 (en) * 2008-04-01 2009-10-02 Biospine Implants Soc Par Acti ADJUSTABLE BEARING BEFORE FASTENING EASILY INTEGRAL IN A VERTEBRAL BODY REPLACEMENT DEVICE
CN102016575B (en) * 2008-05-07 2014-12-03 斯特拉斯克莱德大学 A system and method for cell characterisation
US8670617B2 (en) * 2008-05-14 2014-03-11 Terrago Technologies, Inc. Systems and methods for linking content to individual image features
JP2012529969A (en) 2008-08-01 2012-11-29 ロジャー・ピー・ジャクソン Longitudinal connecting member with tensioning cord with sleeve
US8075603B2 (en) 2008-11-14 2011-12-13 Ortho Innovations, Llc Locking polyaxial ball and socket fastener
US9220547B2 (en) 2009-03-27 2015-12-29 Spinal Elements, Inc. Flanged interbody fusion device
US9526620B2 (en) 2009-03-30 2016-12-27 DePuy Synthes Products, Inc. Zero profile spinal fusion cage
US11229457B2 (en) 2009-06-15 2022-01-25 Roger P. Jackson Pivotal bone anchor assembly with insert tool deployment
CN103826560A (en) 2009-06-15 2014-05-28 罗杰.P.杰克逊 Polyaxial bone anchor with pop-on shank and winged insert with friction fit compressive collet
US8998959B2 (en) 2009-06-15 2015-04-07 Roger P Jackson Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert
US9668771B2 (en) 2009-06-15 2017-06-06 Roger P Jackson Soft stabilization assemblies with off-set connector
EP2753252A1 (en) 2009-06-15 2014-07-16 Jackson, Roger P. Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
WO2011043805A1 (en) * 2009-10-05 2011-04-14 Roger Jackson P Polyaxial bone anchor with non-pivotable retainer and pop-on shank, some with friction fit
EP2329781B1 (en) * 2009-12-03 2015-03-04 Biedermann Technologies GmbH & Co. KG Bone screw
ES2439870T3 (en) * 2009-12-03 2014-01-27 Biedermann Technologies Gmbh & Co. Kg Bone screw
US8764806B2 (en) 2009-12-07 2014-07-01 Samy Abdou Devices and methods for minimally invasive spinal stabilization and instrumentation
US9393129B2 (en) 2009-12-10 2016-07-19 DePuy Synthes Products, Inc. Bellows-like expandable interbody fusion cage
EP2361574B1 (en) 2010-02-26 2014-01-08 Biedermann Technologies GmbH & Co. KG Bone screw
US20120029639A1 (en) * 2010-07-29 2012-02-02 Warsaw Orthopedic, Inc. Interbody spinal implants and insertion techniques
US8480747B2 (en) 2010-08-11 2013-07-09 Warsaw Orthopedic, Inc. Interbody spinal implants with extravertebral support plates
WO2012021354A1 (en) * 2010-08-13 2012-02-16 Synthes Usa, Llc Bone stabilization device
WO2012030712A1 (en) 2010-08-30 2012-03-08 Zimmer Spine, Inc. Polyaxial pedicle screw
JP2013540468A (en) 2010-09-08 2013-11-07 ロジャー・ピー・ジャクソン Dynamic fixing member having an elastic part and an inelastic part
US20120078372A1 (en) 2010-09-23 2012-03-29 Thomas Gamache Novel implant inserter having a laterally-extending dovetail engagement feature
US20120078373A1 (en) 2010-09-23 2012-03-29 Thomas Gamache Stand alone intervertebral fusion device
US11529241B2 (en) 2010-09-23 2022-12-20 DePuy Synthes Products, Inc. Fusion cage with in-line single piece fixation
JP2013545527A (en) 2010-11-02 2013-12-26 ロジャー・ピー・ジャクソン Multi-axis bone anchor with pop-on shank and pivotable retainer
US8454694B2 (en) 2011-03-03 2013-06-04 Warsaw Orthopedic, Inc. Interbody device and plate for spinal stabilization and instruments for positioning same
WO2012128825A1 (en) 2011-03-24 2012-09-27 Jackson Roger P Polyaxial bone anchor with compound articulation and pop-on shank
US8562651B2 (en) * 2011-03-30 2013-10-22 Warsaw Orthopedic, Inc. Sacroiliac terminal anchor device and method
US9248028B2 (en) 2011-09-16 2016-02-02 DePuy Synthes Products, Inc. Removable, bone-securing cover plate for intervertebral fusion cage
US8845728B1 (en) 2011-09-23 2014-09-30 Samy Abdou Spinal fixation devices and methods of use
WO2013106217A1 (en) 2012-01-10 2013-07-18 Jackson, Roger, P. Multi-start closures for open implants
US20130226240A1 (en) 2012-02-22 2013-08-29 Samy Abdou Spinous process fixation devices and methods of use
US9271836B2 (en) * 2012-03-06 2016-03-01 DePuy Synthes Products, Inc. Nubbed plate
US9198767B2 (en) 2012-08-28 2015-12-01 Samy Abdou Devices and methods for spinal stabilization and instrumentation
US9320617B2 (en) 2012-10-22 2016-04-26 Cogent Spine, LLC Devices and methods for spinal stabilization and instrumentation
US10182921B2 (en) 2012-11-09 2019-01-22 DePuy Synthes Products, Inc. Interbody device with opening to allow packing graft and other biologics
US8911478B2 (en) 2012-11-21 2014-12-16 Roger P. Jackson Splay control closure for open bone anchor
US9301783B2 (en) 2013-01-23 2016-04-05 Fixx Orthopedics, LLC Orthopedic external fixation device
US10058354B2 (en) 2013-01-28 2018-08-28 Roger P. Jackson Pivotal bone anchor assembly with frictional shank head seating surfaces
US8852239B2 (en) 2013-02-15 2014-10-07 Roger P Jackson Sagittal angle screw with integral shank and receiver
US9707099B2 (en) * 2013-03-15 2017-07-18 NuTech Spine, Inc. Anterior lumbar fusion method and device
GB2512063B (en) * 2013-03-18 2019-05-29 Fitzbionics Ltd Spinal implant assembly
US9453526B2 (en) 2013-04-30 2016-09-27 Degen Medical, Inc. Bottom-loading anchor assembly
US9283091B2 (en) * 2013-10-07 2016-03-15 Warsaw Orthopedic, Inc. Spinal implant system and method
US9566092B2 (en) 2013-10-29 2017-02-14 Roger P. Jackson Cervical bone anchor with collet retainer and outer locking sleeve
US9717533B2 (en) 2013-12-12 2017-08-01 Roger P. Jackson Bone anchor closure pivot-splay control flange form guide and advancement structure
US9451993B2 (en) 2014-01-09 2016-09-27 Roger P. Jackson Bi-radial pop-on cervical bone anchor
US10064658B2 (en) 2014-06-04 2018-09-04 Roger P. Jackson Polyaxial bone anchor with insert guides
US9597119B2 (en) 2014-06-04 2017-03-21 Roger P. Jackson Polyaxial bone anchor with polymer sleeve
AU2016212009C1 (en) 2015-01-27 2021-02-25 Spinal Elements, Inc. Facet joint implant
WO2016138220A1 (en) 2015-02-27 2016-09-01 Thomas Gerold Orthopedic external fixation device
US9615931B2 (en) * 2015-03-20 2017-04-11 Globus Medical, Inc. Surgical plate systems
AU2016339357B2 (en) * 2015-10-13 2019-08-15 Cg Bio Co., Ltd. Cervical spine fixation apparatus
US10857003B1 (en) 2015-10-14 2020-12-08 Samy Abdou Devices and methods for vertebral stabilization
US10034771B2 (en) 2016-05-11 2018-07-31 Warsaw Orthopedic, Inc. Spinal implant system and method
WO2018067143A1 (en) 2016-10-05 2018-04-12 Wright Dedical Technology, Inc. Implant peg with multiple components
US10973648B1 (en) 2016-10-25 2021-04-13 Samy Abdou Devices and methods for vertebral bone realignment
US10744000B1 (en) 2016-10-25 2020-08-18 Samy Abdou Devices and methods for vertebral bone realignment
US10624760B2 (en) 2017-05-22 2020-04-21 Warsaw Orthopedic, Inc. Spinal implant system and method
US10940016B2 (en) 2017-07-05 2021-03-09 Medos International Sarl Expandable intervertebral fusion cage
CA3111008A1 (en) 2018-09-20 2020-03-26 Spinal Elements, Inc. Spinal implant device
US11179248B2 (en) 2018-10-02 2021-11-23 Samy Abdou Devices and methods for spinal implantation
CA3145467A1 (en) * 2019-07-03 2021-01-07 Ergosurgical Group Corp. Threading devices and methods of manufacture thereof
WO2022109524A1 (en) 2020-11-19 2022-05-27 Spinal Elements, Inc. Curved expandable interbody devices and deployment tools

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB231155A (en) 1924-03-18 1925-06-25 Wiljo Nestor Kaernae Improvements in wood screws
DE867422C (en) * 1951-11-13 1953-02-16 Alfred Dr Med Abel Screw-on bone plate for the healing of broken bones
CH648197A5 (en) * 1980-05-28 1985-03-15 Synthes Ag IMPLANT AND SCREW FASTENING ON ITS BONE.
US4537185A (en) * 1983-06-10 1985-08-27 Denis P. Stednitz Cannulated fixation screw
WO1988003781A1 (en) * 1986-11-25 1988-06-02 Synthes Ag Osteosynthetic device
US5015247A (en) 1988-06-13 1991-05-14 Michelson Gary K Threaded spinal implant
US5129901A (en) 1991-06-10 1992-07-14 Decoste Vern X Cannulated orthopedic screw
WO1996008206A1 (en) * 1994-09-15 1996-03-21 Smith & Nephew Richards Inc. Osteosynthesis apparatus
FR2726171B1 (en) 1994-10-28 1997-01-24 Jbs Sa REHABITABLE CONNECTING SCREW DEVICE FOR BONE JOINT, IN PARTICULAR FOR STABILIZING AT LEAST TWO VERTEBRES
US5860973A (en) 1995-02-27 1999-01-19 Michelson; Gary Karlin Translateral spinal implant
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
DE29710979U1 (en) 1997-06-24 1997-08-21 Aesculap Ag & Co Kg Implant for fixing bone parts and tool for this implant
US6156037A (en) 1998-10-28 2000-12-05 Sdgi Holdings, Inc. Anterior lateral spine cage-plate fixation device and technique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9480510B2 (en) 2011-03-23 2016-11-01 Spinecraft, LLC Devices, systems and methods of attaching same to the spine

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AU8725098A (en) 2000-03-14
ZA994847B (en) 2000-02-15
AU747042B2 (en) 2002-05-09
WO2000010474A1 (en) 2000-03-02
JP2002523129A (en) 2002-07-30
US6508818B2 (en) 2003-01-21
US20010007941A1 (en) 2001-07-12

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Effective date: 20070821