CA2478581A1 - Intervertebral implant - Google Patents
Intervertebral implant Download PDFInfo
- Publication number
- CA2478581A1 CA2478581A1 CA002478581A CA2478581A CA2478581A1 CA 2478581 A1 CA2478581 A1 CA 2478581A1 CA 002478581 A CA002478581 A CA 002478581A CA 2478581 A CA2478581 A CA 2478581A CA 2478581 A1 CA2478581 A1 CA 2478581A1
- Authority
- CA
- Canada
- Prior art keywords
- intervertebral implant
- implant
- boreholes
- longitudinal
- underside
- 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.)
- Granted
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
- A61F2/4465—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
-
- 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
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
- A61F2/447—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30774—Apertures or holes, e.g. of circular cross section internally-threaded
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30777—Oblong apertures
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
Abstract
Disclosed is an intervertebral implant shaped as a three-dimensional body (10), comprising: a) a top side (1) and a bottom side (2) used for the positioning thereof against the end plates of two adjacent vertebral bodies; b) a left-hand surface (3) and a right-hand surface (4); c) a front surface (5) and a rear surface (6); d) a horizontal central plane (7) located between the top side (1) and the bottom side (2); e) a vertical central plane (8) located between the left-hand surface (3) and the right-hand surface (4); and f) a plurality of bore holes (9) penetrating the body (10), which receive longitudinal fixing elements (20) and the axes (19) of which intersect the horizontal central plane (7). At least one of said bore holes (9) is configured in such a way that a longitudinal fixing element (10) that is received therein can be connected in a rigid manner to the intervertebral implant. This procedure is carried out effectively by means of a screw thread or corresponding cone-shaped surfaces.
Claims (35)
1. An intervertebral implant in the form of a three-dimensional (3D) structure (10), comprising (a) a top side (1) and an underside (2) which are designed to rest against the end plates of two adjacent vertebras, (b) a left side face (3) and a right side face (4), (c) a front face (5) and a rear face (6), (d) a horizontal center plane (7) situated between the top side (1) and the underside (2), and (e) a plurality of boreholes (9) passing through the implant structure (10) receiving longitudinal affixation elements (20) and comprising axes (19) that intersect the horizontal center plane (7), characterized in that (f) at least one of the boreholes (9) is designed so that a longitudinal affixation element (20) received in it can be connected rigidly to the intervertebral implant.
2. Intervertebral implant as claimed in claim 1, characterized in that the 3D
structure (10) comprises at its front face (5) a front plate (8) which is mounted vertically to the horizontal center plane (7) said boreholes (9) passing through this front plate and the longitudinal affixation elements (20) being anchorable in it.
structure (10) comprises at its front face (5) a front plate (8) which is mounted vertically to the horizontal center plane (7) said boreholes (9) passing through this front plate and the longitudinal affixation elements (20) being anchorable in it.
3. Intervertebral implant as claimed in claim 2, characterized in that the front plate (8) in the 3D implant structure (10) is vertically displaceable relative to the center plane (7).
4. Intervertebral implant as claimed in either of claims 2 and 3, characterized in that the front plate (8) is made of a material different from that of the 3D implant structure (10).
5. Intervertebral implant as claimed in one of claims 1 through 4, characterized in that at least one of the boreholes (9) comprises an inside thread.
6. Intervertebral implant as claimed in one of claims 1 through 5, characterized in that at least one borehole (9) tapers conically toward the underside (2).
7. Intervertebral implant as claimed in claim 6, characterized in that the cone angle of the conical borehole (9) is smaller than the resulting angle of friction.
8. Intervertebral implant as claimed in claim 7, characterized in that the conicity of the conical borehole (9) is in the range of 1:3,75 to 1:20,00, preferably in the range of 1:5 to 1:15.
9. Intervertebral implant as claimed in one of claims 1 through 8, characterized in that its side faces (1, 2, 3, 4, 5, 6) are all substantially convex.
10. Intervertebral implant as claimed in one of claims 1 through 9, characterized in that the top side (1) and/or the underside (2) are non-planar and preferably convex.
11. Intervertebral implant as claimed in one of claims 1 through 10, characterized in that the boreholes (9) do not pass through the left side face (3) nor through the right side face (4).
12. Intervertebral implant as claimed in one of claims 1 through 11, characterized in that the boreholes (9) do not pass through the front face (5).
13. Intervertebral implant as claimed in one of claims 1 through 12, characterized in that at least two of the boreholes (9) run mutually parallel.
14. Intervertebral implant as claimed in one of claims 1 through 13, characterized in that at least two of the boreholes (9) diverge from each other as seen from the front side (1).
15. Intervertebral implant as claimed in one of claims 1 through 4, characterized in that the axes (19) of the boreholes (9) subtend an angle in the range of 25° to 70°, preferably 35° to 55°, with the horizontal center plane.
16. Intervertebral implant as claimed in one of claims 1 through 15, characterized in that the boreholes (9) do not pass through the horizontal center plane (7).
17. Intervertebral implant as claimed in one of claims 1 through 16, comprising at least two longitudinal affixation elements (20) which are inserted into the boreholes (9) and which are fitted with a head (21) and a tip (22), characterized in that at least one longitudinal affixation element (20) passes through the top side (1) and at least one longitudinal affixation element (20) passes through the underside (2).
18. Intervertebral implant as claimed in claim 17, characterized in that the longitudinal affixation elements (20) are bone screws having a head (21) and a shank (23).
19. Intervertebral implant as claimed in claim 18, characterized in that the head (21) is fitted with an external thread (24) which matches the inner thread (11) of the borehole (9).
20. Intervertebral implant as claimed in either of claims 18 and 19, characterized in that the head (21) conically tapers toward the shank (23), the conicity of the head (21) preferably matching the conicity of the borehole (9).
21. Intervertebral implant as claimed in one of claims 17 to 20, characterized in that at least two longitudinal affixation elements (20) pass through the top side (1) and at least two longitudinal affixation elements (20) pass through the underside (2).
22. Intervertebral implant as claimed in one of claims 17 through 21, characterized in that the longitudinal affixation elements (20) are bone screws of which the shanks are fitted with external threads (25) that preferably shall be self-boring and self-tapping.
23. Intervertebral implant as claimed in one of claims 17 through 22, characterized in that the longitudinal fixation affixation elements (20) are unthreaded cylindrical pins having a drilling tip preferably in the form of a trocar.
24. Intervertebral implant as claimed in one of claims 17 through 22, characterized in that the longitudinal fixation elements (20) are spiral springs.
25. Intervertebral implant as claimed in one of claims 17 through 22, characterized in that the longitudinal affixation elements (20) are single wing or multi-wing spiral blades.
26. Intervertebral implant as claimed in one of claims 17 through 25, characterized in that the tip (22) of the longitudinal affixation element (20) can be anchored in the implant structure (10) in a manner that the head (21) of the longitudinal affixation element (20) can be anchored in the adjacent vertebra.
27. Intervertebral implant as claimed in claim 26, characterized by the head (21) of the longitudinal affixation element (20) comprising a widened diameter and additionally by a support disk (30) designed to rest against the vertebra and being provided for said head.
28. intervertebral implant as claimed in one of claims 17 through 27, characterized in that the implant structure (10) consists of a plastic, preferably a non-reinforced plastic.
29. Intervertebral implant as claimed in claim 28, characterized in that the external thread (25) of the bone screws (20) comprise a load bevel angle in the range of 11° to 14°, preferably of 12° to 13°.
30. Intervertebral implant as claimed in one of claims 17 through 29, characterized in that the external thread (25) of the bone screws exhibits an angular pitch in the range of 6° to 10°, preferably 7° to 9°.
31. Intervertebral implant as claimed in one of claims 1 through 30, characterized in that the borehole (9) comprises a metal bush with an inner thread (11).
32. Intervertebral implant as claimed in one of claims 1 through 31, characterized in that it is made partly of plastic and in that in the zone of the boreholes (9) it is made of metal.
33. Intervertebral implant as claimed in one of claims 28 through 32, characterized in that the boreholes (9) exhibit a smooth inner wall into which the threaded head of a metal, longitudinal affixation element (20) may be cut or integrated.
34. Intervertebral implant as claimed in one of claims 1 through 33, characterized in that its top side (1) and its underside (2) are shaped preferably in the form of teeth.
35. Intervertebral implant as claimed in one of claims 1 through 34, characterized in that it is in the form of a hollow structure of which the outside surfaces are preferably perforated.
1. An intervertebral implant in the form of a three-dimensional (3D) structure (10), comprising (a) a top side (1) and an underside (2) which are appropriate to rest against the end plates of two adjacent vertebras, (b) a left side face (3) and a right side face (4), (c) a front face (5) and a rear face (6), (d) a horizontal center plane (7) situated between the top side (1) and the underside (2), and (e) a plurality of boreholes (9) passing through the implant structure (10) receiving longitudinal affixation elements (20) and comprising axes (19) that intersect the horizontal center plane (7), further (f) at least one of the boreholes (9) is designed so that a longitudinal affixation element (20) received in it can be connected rigidly to the intervertebral implant, characterized in that (g) the 3D implant structure (10) comprises at its front face (5) a front plate (8) which is configured vertically to the horizontal center plane, the boreholes (9) passing through said plate (8) and the longitudinal affixation elements (20) being anchorable in it.
2. Intervertebral implant as claimed in claim 1, characterized in that the front plate (8) is configured in the 3D implant structure (1) to be vertically displaceable relative to the center plane (7).
3. Intervertebral implant as claimed in either of claims 1 and 2, characterized in that the front plate (8) is made of a material different from that of the 3D
implant structure (10).
4. Intervertebral implant as claimed in claim 3, characterized in that the front plate (4) is metallic.
5. Intervertebral implant as claimed in one of claims 1 through 4, characterized in that at least one of the boreholes (9) comprises an inside thread.
6. Intervertebral implant as claimed in one of claims 1 through 5, characterized in that at least one borehole (9) tapers conically toward the underside (2).
7. Intervertebral implant as claimed in claim 6, characterized in that the cone angle of the conical borehole (9) is smaller than the resulting angle of friction.
8. Intervertebral implant as claimed in claim 7, characterized in that the conicity of the conical borehole (9) is in the range of 1:3.75 to 1:20.00, preferably in the range of 1:5 to 1:15.
1. An intervertebral implant in the form of a three-dimensional (3D) structure (10), comprising (a) a top side (1) and an underside (2) which are appropriate to rest against the end plates of two adjacent vertebras, (b) a left side face (3) and a right side face (4), (c) a front face (5) and a rear face (6), (d) a horizontal center plane (7) situated between the top side (1) and the underside (2), and (e) a plurality of boreholes (9) passing through the implant structure (10) receiving longitudinal affixation elements (20) and comprising axes (19) that intersect the horizontal center plane (7), further (f) at least one of the boreholes (9) is designed so that a longitudinal affixation element (20) received in it can be connected rigidly to the intervertebral implant, characterized in that (g) the 3D implant structure (10) comprises at its front face (5) a front plate (8) which is configured vertically to the horizontal center plane, the boreholes (9) passing through said plate (8) and the longitudinal affixation elements (20) being anchorable in it.
2. Intervertebral implant as claimed in claim 1, characterized in that the front plate (8) is configured in the 3D implant structure (1) to be vertically displaceable relative to the center plane (7).
3. Intervertebral implant as claimed in either of claims 1 and 2, characterized in that the front plate (8) is made of a material different from that of the 3D
implant structure (10).
4. Intervertebral implant as claimed in claim 3, characterized in that the front plate (4) is metallic.
5. Intervertebral implant as claimed in one of claims 1 through 4, characterized in that at least one of the boreholes (9) comprises an inside thread.
6. Intervertebral implant as claimed in one of claims 1 through 5, characterized in that at least one borehole (9) tapers conically toward the underside (2).
7. Intervertebral implant as claimed in claim 6, characterized in that the cone angle of the conical borehole (9) is smaller than the resulting angle of friction.
8. Intervertebral implant as claimed in claim 7, characterized in that the conicity of the conical borehole (9) is in the range of 1:3.75 to 1:20.00, preferably in the range of 1:5 to 1:15.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2002/000099 WO2003070128A1 (en) | 2002-02-19 | 2002-02-19 | Intervertebral implant |
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Publication Number | Publication Date |
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CA2478581A1 true CA2478581A1 (en) | 2003-08-28 |
CA2478581C CA2478581C (en) | 2010-01-19 |
Family
ID=27740041
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Application Number | Title | Priority Date | Filing Date |
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CA002478581A Expired - Fee Related CA2478581C (en) | 2002-02-19 | 2002-02-19 | Intervertebral implant |
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US (12) | US7232464B2 (en) |
EP (1) | EP1476098B1 (en) |
JP (1) | JP4220395B2 (en) |
KR (1) | KR100882602B1 (en) |
CN (1) | CN100400014C (en) |
AR (1) | AR038680A1 (en) |
AT (1) | ATE390898T1 (en) |
AU (1) | AU2002229462B2 (en) |
BR (1) | BR0215599B1 (en) |
CA (1) | CA2478581C (en) |
DE (1) | DE50212036D1 (en) |
ES (1) | ES2304428T3 (en) |
MX (1) | MXPA04008099A (en) |
NO (1) | NO20043905L (en) |
NZ (1) | NZ534638A (en) |
WO (1) | WO2003070128A1 (en) |
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