US20120083891A1 - Cervical intervertebral prosthesis - Google Patents

Cervical intervertebral prosthesis Download PDF

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Publication number
US20120083891A1
US20120083891A1 US13/327,589 US201113327589A US2012083891A1 US 20120083891 A1 US20120083891 A1 US 20120083891A1 US 201113327589 A US201113327589 A US 201113327589A US 2012083891 A1 US2012083891 A1 US 2012083891A1
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United States
Prior art keywords
hinge
connection plate
receiving area
hinge core
spinal implant
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Abandoned
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US13/327,589
Inventor
Arnold Keller
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Cervitech Inc
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Cervitech Inc
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Priority to US13/327,589 priority Critical patent/US20120083891A1/en
Publication of US20120083891A1 publication Critical patent/US20120083891A1/en
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NUVASIVE CLINICAL SERVICES MONITORING, INC., NUVASIVE CLINICAL SERVICES, INC., NUVASIVE SPECIALIZED ORTHOPEDICS, INC., NUVASIVE, INC.
Abandoned legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • A61F2/4425Intervertebral or spinal discs, e.g. resilient made of articulated components
    • AHUMAN NECESSITIES
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    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/30369Limited lateral translation of the protrusion within a larger recess
    • AHUMAN NECESSITIES
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    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305Snap connection
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    • A61F2/00Filters 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
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30574Special structural features of bone or joint prostheses not otherwise provided for with an integral complete or partial collar or flange
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30576Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • A61F2002/30578Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604Special structural features of bone or joint prostheses not otherwise provided for modular
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30621Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649Ball-and-socket joints
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30621Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649Ball-and-socket joints
    • A61F2002/30662Ball-and-socket joints with rotation-limiting means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30904Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • A61F2/4425Intervertebral or spinal discs, e.g. resilient made of articulated components
    • A61F2002/443Intervertebral or spinal discs, e.g. resilient made of articulated components having two transversal endplates and at least one intermediate component
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00179Ceramics or ceramic-like structures

Definitions

  • a cervical intervertebral prosthesis is known (U.S. Pat. No. 6,368,350) which is composed of an upper connection plate and a lower connection plate for connection to the adjacent vertebral bodies, and of a hinge core which, with one connection plate, forms a hinge with a convex hinge surface on the underside of the upper connection plate and with a concave hinge surface on the top side of the hinge core.
  • the hinge core bears on the other connection plate via a slide surface which extends parallel to the direction of extension of the connection plate and which permits a relative translatory movement of the hinge core in this direction with respect to the lower connection plate. This relative movement is limited by means of the slide surface being restricted by a vertical edge.
  • the hinge surface of the hinge core has a very shallow dish-like configuration. This is customary, because it is possible in this way to achieve a low specific surface load.
  • this entails the risk that, if the ligaments connecting the relevant vertebral bodies to one another are too weak or stretched, the prosthesis parts may come loose from one another.
  • U.S. Pat. No. 5,895,4208 to connect the prosthesis parts to one another by means of a screw passing centrally through the hinge surfaces, this cannot be done in conjunction with the abovementioned translatory freedom of movement of the hinge core parallel to the extension of the connection plates, and, in any case, this is impossible in a cervical prosthesis, because of the confined space.
  • a cervical intervertebral prosthesis including first and second connection plates configured for connection to adjacent vertebral bodies and hinge core which forms together with the first connection plate a hinge with a concave hinge surface on the hinge core and with a complementary convex hinge surface on the first connection plate.
  • the convex hinge surface bears on the second connection plate via a slide surface which extends substantially parallel to the direction of the second connection plate and which permits relative movement in the direction of the second connection plate. This slide surface is surrounded by an edge limiting the relative movement.
  • the concave hinge surface encloses the convex hinge surface within a solid angle of at least 90°, and the part of the convex hinge surface lying within this solid angle lies inside a recess surrounded by the edge.
  • the concave hinge surface encloses the convex hinge surface within a solid angle of at least 90°. This ensures that forces acting obliquely from the side cannot push the convex hinge surface out of the concave hinge surface. Since the stated angle indicates the area within which the concave hinge surface encloses the convex hinge surface, it is referred to below as the enclosure angle. It is expediently at least 110°, more preferably 135°. If, according to a further feature of the invention, it is over 180°, the convex hinge surface is secured completely within the concave hinge surface.
  • the enclosure angle or solid angle is measured as the central angle of a circular cone between radii issuing from opposite points of the edge of the concave hinge surface.
  • the invention further provides that the part of the concave hinge surface located within the solid angle of at least 90° lies inside the recess enclosed by the edge. That is to say, this part of the hinge surface lies below the surface spanned by the top face of the edge.
  • the effect is that it is highly unlikely that the hinge core will be able to be pushed, by laterally incident forces, out of the recess of the connection plate in question. If, as has been described above as being advantageous, an enclosure angle of over 90° is chosen, that part of the convex hinge surface extending beyond 90° does not then have to lie in the recess. However, it is advantageous if it does so.
  • the positioning of the convex hinge surface inside the recess serves not only to secure the hinge core on the connection plate holding it, but also to reduce the overall height of the prosthesis.
  • the radius of the convex hinge surface is so small in relation to the cross section of the hinge core that it is for the most part inside that part of the hinge core surrounded by the recess of the lower connection plate.
  • the hinge core can be configured such that it lies almost exclusively inside the recess. However, it can be provided with a collar which rests on the top face of the edge of the recess in order to rule out direct contact between the metal parts of the upper and lower connection plates upon flexion of the joint.
  • the recess should accommodate the hinge core at least to one third, preferably to about half, of its hinge surface radius.
  • a configuration is especially preferred in which the recess accommodates the hinge core substantially to the height of the center point of its hinge surface.
  • the minimum height of the edge surrounding the recess, above the slide surface, should be least one quarter, preferably at least one third, of the antero-posterior (hereinafter “AP”) extent of the recess.
  • AP antero-posterior
  • recess is rectangular, and preferably square, and its boundaries run parallel to the AP direction and transversely thereto. This has the advantage that a recess of the greatest possible dimension can be accommodated in the lower connection plate.
  • a rectangularly delimited hinge core is available which in one direction has a shorter side length than the recess, while its other site length substantially corresponds to the side length of the recess.
  • the freedom of movement of the hinge core can be restricted to the AP direction (this is the most common scenario) or to the direction perpendicular to the AP direction. If, in a further variant, the translatory movement of the hinge core is to be ruled out entirely, a hinge core is used which is square and has the same dimensions as the recess. If, by contrast, freedom of movement is desired in all directions, the dimensions of the hinge core in all directions are chosen smaller than those of the recess.
  • FIG. 1 shows a sagittal section through a first embodiment
  • FIG. 2 shows a sagittal section through a second embodiment
  • FIG. 3 shows an exploded perspective view of two connection dates and, shown between them, different versions of hinge cores.
  • a first connection plate 1 has a surface 2 intended for connection to the cover plate of a first vertebral body. It can be equipped with teeth or other means permitting intimate connection with the bone tissue.
  • a ventral flange includes a screw bore 4 for a bone screw. It will be appreciated that these structural details of the prosthesis will be able to be configured differently.
  • a second cover plate 5 has a surface 6 for connection to the second vertebral body, and a ventral flange 7 with screw bore 8 .
  • the first connection plate 1 is depicted at the top, and it is also in most cases used at the top. In the following, therefore, it is designated as the upper connection plate, and the other one is designated as the lower connection plate. The arrangement, however, can also be the other way round.
  • connection plate The underside of the upper connection plate carries a hinge head 10 which forms a convex hinge surface 11 with center point 12 .
  • the lower connection plate carries a peripheral edge 15 which surrounds a square recess 16 above a plane slide surface 17 .
  • the inner surfaces of the edge 15 extend perpendicularly with respect to slide surface 17 forming the bottom of the recess 16 , and parallel to the AP direction or perpendicularly thereto.
  • the corners 18 are rounded.
  • the dimensions 26 , 27 in the AP direction and transversely thereto, respectively, are identical.
  • the connection plates 1 , 5 are expediently made of a durable material, such, as metal.
  • the hinge core 20 expediently made of polyethylene, ceramic or another material that favors sliding, is located inside the recess 16 . It has a plane bottom surface which bears on the slide surface 17 across the greatest possible area and, together with this, forms a sliding bearing for translatory movement. Its side surface 21 extending in the AP direction, and the side surface 22 extending transversely thereto, form a rectangular boundary similar and complementary to the demarcation of the recess 16 by the inner surfaces of the edge 15 .
  • the hinge core 20 carries a collar 25 which rests on the top face of the edge 15 . In the event of a flexion movement, it protects the underside of the upper connection plate 1 from direct contact with parts of the lower connection plate 5 . In the lateral area 24 between connection plates 1 , 5 , sufficient space remains for a relative flexion movement.
  • the hinge core 20 includes a spherical depression which is complementary to the convex hinge surface 11 and forms the associated concave hinge surface. Its center point 12 coincides with that of the convex hinge surface 11 . It encloses the convex hinge surface 11 within an enclosure angle 28 of more than 180 degrees. Above the center point 12 , it narrows slightly so that the hinge head 10 can escape from it only under elastic deformation and is therefore held securely in it under normal force conditions.
  • the flexion joint has a high degree of stability even under the effect of forces acting from the side.
  • the hinge core 20 is held with a high degree of stability inside the recess 16 by the edge 15 . This is because the hinge core 20 is almost completely surrounded, at any rate to a considerable height, by the edge 15 . Its top edge and the surface 23 spanned by the latter are higher than the center point 12 of the concave hinge surface 11 .
  • the height 29 of the edge 15 above the slide surface 17 is slightly (greater than two fifths of the AP dimension 26 of the recess 16 . Even if the hinge core were to be lifted slightly by unanticipated forces, the edge 15 always returns it to the position shown.
  • connection plates 1 , 5 can be combined with hinge cores of different side lengths. This is illustrated in FIG. 3 .
  • the dimensions of the side surfaces of the hinge core “a” are equal (with reasonable play) to the inner surfaces of the edge 15 .
  • it When it is fitted into the recess 16 of the lower connection plate, it has no translatory mobility relative to the lower connection plate 5 . It is therefore used in the case of greatly weakened ligaments, if the prosthesis has to ensure the stabilizing of the intervertebral joint.
  • the hinge core “c” is smaller than the recess 16 both in the AP direction and transversely thereto. Is a result, there is a possibility of limited movement in all directions. This hinge core is used in those cases where the joint can be allowed a translators movement by a certain distance, but where stabilizing is desired after this distance.
  • the hinge core “b” represents a cross between the aforementioned possibilities, since the side length of its site surfaces 21 is equal to the side lengths 26 , 27 of the recess 16 , whereas the pair of side surfaces 22 transverse thereto is shorter. This means that the hinge core “b” is not movable relative to the associated lower connection plate 5 in the direction of the side surfaces 21 , but is movable to a limited extent in the direction of the site surfaces 22 .
  • This hinge core is used when the need for stabilization differs in different directions. The mobility is in most cases provided in the AP direction, while the connection in the transverse direction is fixed. The reverse option, however, can also be achieved.
  • FIG. 2 shows an illustrative embodiment which differs from that in FIG. 1 in terms of a more shallow design of the hinge surfaces 11 ′ and a lower hinge core 20 ′.
  • the enclosure angle 28 ′ is only about 110°.
  • the area of the hinge surface 11 ′ defined by it lies entirely inside the recess 16 ′, i.e. not higher than the upper boundary surface 231 .
  • the radius 30 of the hinge surface lies more than one third below the boundary surface 23 ′ inside the recess 16 ′.
  • the height 29 ′ of the recess 16 ′ is equal to about one third. of the AP dimension of the recess.
  • the total height of the prosthesis is slightly less than that of the first illustrative embodiment. Nonetheless, it affords a high level of lateral stability.

Abstract

A spinal implant includes two connection plates dimensioned for connection to adjacent vertebral bodies and a hinge core. The hinge core together with one connection plate forms a hinge between a generally spherical hinge extending from the one connection plate into an opening of a generally spherical depression in the hinge core. The opening is dimensioned to be elastically deformed to allow passage of the generally spherical hinge into the generally spherical depression. The hinge core bears on a slide surface which extends substantially parallel to the direction of the other connection plate and permits relative translatory movement of the hinge core. The walled receiving area limits this relative translatory movement of the hinge core. The stability of the spinal implant with respect to laterally incident forces is increased.

Description

    FIELD AND BACKGROUND OF THE INVENTION
  • A cervical intervertebral prosthesis is known (U.S. Pat. No. 6,368,350) which is composed of an upper connection plate and a lower connection plate for connection to the adjacent vertebral bodies, and of a hinge core which, with one connection plate, forms a hinge with a convex hinge surface on the underside of the upper connection plate and with a concave hinge surface on the top side of the hinge core. The hinge core bears on the other connection plate via a slide surface which extends parallel to the direction of extension of the connection plate and which permits a relative translatory movement of the hinge core in this direction with respect to the lower connection plate. This relative movement is limited by means of the slide surface being restricted by a vertical edge. In the known prosthesis, the hinge surface of the hinge core has a very shallow dish-like configuration. This is customary, because it is possible in this way to achieve a low specific surface load. However, this entails the risk that, if the ligaments connecting the relevant vertebral bodies to one another are too weak or stretched, the prosthesis parts may come loose from one another. Although is known (U.S. Pat. No. 5,895,428) to connect the prosthesis parts to one another by means of a screw passing centrally through the hinge surfaces, this cannot be done in conjunction with the abovementioned translatory freedom of movement of the hinge core parallel to the extension of the connection plates, and, in any case, this is impossible in a cervical prosthesis, because of the confined space.
  • SUMMARY OF THE INVENTION
  • It is therefore an object of the invention to make available a prosthesis, of the type mentioned above, which promises sufficient stability even in the case of weak ligaments. The solution lies in the features of the invention, which broadly includes a cervical intervertebral prosthesis including first and second connection plates configured for connection to adjacent vertebral bodies and hinge core which forms together with the first connection plate a hinge with a concave hinge surface on the hinge core and with a complementary convex hinge surface on the first connection plate. The convex hinge surface bears on the second connection plate via a slide surface which extends substantially parallel to the direction of the second connection plate and which permits relative movement in the direction of the second connection plate. This slide surface is surrounded by an edge limiting the relative movement. The concave hinge surface encloses the convex hinge surface within a solid angle of at least 90°, and the part of the convex hinge surface lying within this solid angle lies inside a recess surrounded by the edge. Other features of the invention are disclosed below.
  • Accordingly, it is provided that the concave hinge surface encloses the convex hinge surface within a solid angle of at least 90°. This ensures that forces acting obliquely from the side cannot push the convex hinge surface out of the concave hinge surface. Since the stated angle indicates the area within which the concave hinge surface encloses the convex hinge surface, it is referred to below as the enclosure angle. It is expediently at least 110°, more preferably 135°. If, according to a further feature of the invention, it is over 180°, the convex hinge surface is secured completely within the concave hinge surface. The enclosure angle or solid angle is measured as the central angle of a circular cone between radii issuing from opposite points of the edge of the concave hinge surface.
  • As the stabilization of the prosthesis in the area of the hinge surfaces would be futile if the attachment of the hinge core to the other connection plate was unstable, the invention further provides that the part of the concave hinge surface located within the solid angle of at least 90° lies inside the recess enclosed by the edge. That is to say, this part of the hinge surface lies below the surface spanned by the top face of the edge. The effect is that it is highly unlikely that the hinge core will be able to be pushed, by laterally incident forces, out of the recess of the connection plate in question. If, as has been described above as being advantageous, an enclosure angle of over 90° is chosen, that part of the convex hinge surface extending beyond 90° does not then have to lie in the recess. However, it is advantageous if it does so.
  • The positioning of the convex hinge surface inside the recess serves not only to secure the hinge core on the connection plate holding it, but also to reduce the overall height of the prosthesis. The radius of the convex hinge surface is so small in relation to the cross section of the hinge core that it is for the most part inside that part of the hinge core surrounded by the recess of the lower connection plate. The hinge core can be configured such that it lies almost exclusively inside the recess. However, it can be provided with a collar which rests on the top face of the edge of the recess in order to rule out direct contact between the metal parts of the upper and lower connection plates upon flexion of the joint.
  • The recess should accommodate the hinge core at least to one third, preferably to about half, of its hinge surface radius. A configuration is especially preferred in which the recess accommodates the hinge core substantially to the height of the center point of its hinge surface. The minimum height of the edge surrounding the recess, above the slide surface, should be least one quarter, preferably at least one third, of the antero-posterior (hereinafter “AP”) extent of the recess.
  • Through the interaction of the hinge core with the edge of the recess, the freedom of movement of the hinge core can be predetermined in a desired manner. In an advantageous embodiment, recess is rectangular, and preferably square, and its boundaries run parallel to the AP direction and transversely thereto. This has the advantage that a recess of the greatest possible dimension can be accommodated in the lower connection plate. In a first variant of this embodiment, a rectangularly delimited hinge core is available which in one direction has a shorter side length than the recess, while its other site length substantially corresponds to the side length of the recess. In this way, depending on the or of the hinge core in the recess, the freedom of movement of the hinge core can be restricted to the AP direction (this is the most common scenario) or to the direction perpendicular to the AP direction. If, in a further variant, the translatory movement of the hinge core is to be ruled out entirely, a hinge core is used which is square and has the same dimensions as the recess. If, by contrast, freedom of movement is desired in all directions, the dimensions of the hinge core in all directions are chosen smaller than those of the recess.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention is explained in greater detail below with reference to the drawing, in which:
  • FIG. 1 shows a sagittal section through a first embodiment,
  • FIG. 2 shows a sagittal section through a second embodiment, and
  • FIG. 3 shows an exploded perspective view of two connection dates and, shown between them, different versions of hinge cores.
  • DETAILED DESCRIPTION OF THE INVENTION
  • A first connection plate 1 has a surface 2 intended for connection to the cover plate of a first vertebral body. It can be equipped with teeth or other means permitting intimate connection with the bone tissue. A ventral flange includes a screw bore 4 for a bone screw. It will be appreciated that these structural details of the prosthesis will be able to be configured differently. A second cover plate 5 has a surface 6 for connection to the second vertebral body, and a ventral flange 7 with screw bore 8. The first connection plate 1 is depicted at the top, and it is also in most cases used at the top. In the following, therefore, it is designated as the upper connection plate, and the other one is designated as the lower connection plate. The arrangement, however, can also be the other way round.
  • The underside of the upper connection plate carries a hinge head 10 which forms a convex hinge surface 11 with center point 12. The lower connection plate carries a peripheral edge 15 which surrounds a square recess 16 above a plane slide surface 17. The inner surfaces of the edge 15 extend perpendicularly with respect to slide surface 17 forming the bottom of the recess 16, and parallel to the AP direction or perpendicularly thereto. The corners 18 are rounded. The dimensions 26, 27 in the AP direction and transversely thereto, respectively, are identical. The connection plates 1, 5 are expediently made of a durable material, such, as metal.
  • The hinge core 20, expediently made of polyethylene, ceramic or another material that favors sliding, is located inside the recess 16. It has a plane bottom surface which bears on the slide surface 17 across the greatest possible area and, together with this, forms a sliding bearing for translatory movement. Its side surface 21 extending in the AP direction, and the side surface 22 extending transversely thereto, form a rectangular boundary similar and complementary to the demarcation of the recess 16 by the inner surfaces of the edge 15.
  • At the upper edge, the hinge core 20 carries a collar 25 which rests on the top face of the edge 15. In the event of a flexion movement, it protects the underside of the upper connection plate 1 from direct contact with parts of the lower connection plate 5. In the lateral area 24 between connection plates 1, 5, sufficient space remains for a relative flexion movement.
  • The hinge core 20 includes a spherical depression which is complementary to the convex hinge surface 11 and forms the associated concave hinge surface. Its center point 12 coincides with that of the convex hinge surface 11. It encloses the convex hinge surface 11 within an enclosure angle 28 of more than 180 degrees. Above the center point 12, it narrows slightly so that the hinge head 10 can escape from it only under elastic deformation and is therefore held securely in it under normal force conditions.
  • By virtue of the fact that the hinge head 10 is substantially enclosed by the concave hinge surface 11 of the hinge core 20, the flexion joint has a high degree of stability even under the effect of forces acting from the side. Likewise, the hinge core 20 is held with a high degree of stability inside the recess 16 by the edge 15. This is because the hinge core 20 is almost completely surrounded, at any rate to a considerable height, by the edge 15. Its top edge and the surface 23 spanned by the latter are higher than the center point 12 of the concave hinge surface 11. The height 29 of the edge 15 above the slide surface 17 is slightly (greater than two fifths of the AP dimension 26 of the recess 16. Even if the hinge core were to be lifted slightly by unanticipated forces, the edge 15 always returns it to the position shown.
  • The connection plates 1, 5 can be combined with hinge cores of different side lengths. This is illustrated in FIG. 3. The dimensions of the side surfaces of the hinge core “a” are equal (with reasonable play) to the inner surfaces of the edge 15. When it is fitted into the recess 16 of the lower connection plate, it has no translatory mobility relative to the lower connection plate 5. It is therefore used in the case of greatly weakened ligaments, if the prosthesis has to ensure the stabilizing of the intervertebral joint.
  • The hinge core “c” is smaller than the recess 16 both in the AP direction and transversely thereto. Is a result, there is a possibility of limited movement in all directions. This hinge core is used in those cases where the joint can be allowed a translators movement by a certain distance, but where stabilizing is desired after this distance.
  • The hinge core “b” represents a cross between the aforementioned possibilities, since the side length of its site surfaces 21 is equal to the side lengths 26, 27 of the recess 16, whereas the pair of side surfaces 22 transverse thereto is shorter. This means that the hinge core “b” is not movable relative to the associated lower connection plate 5 in the direction of the side surfaces 21, but is movable to a limited extent in the direction of the site surfaces 22. This hinge core is used when the need for stabilization differs in different directions. The mobility is in most cases provided in the AP direction, while the connection in the transverse direction is fixed. The reverse option, however, can also be achieved.
  • FIG. 2 shows an illustrative embodiment which differs from that in FIG. 1 in terms of a more shallow design of the hinge surfaces 11′ and a lower hinge core 20′. The enclosure angle 28′ is only about 110°. The area of the hinge surface 11′ defined by it lies entirely inside the recess 16′, i.e. not higher than the upper boundary surface 231. With its portion 31, the radius 30 of the hinge surface lies more than one third below the boundary surface 23′ inside the recess 16′. The height 29′ of the recess 16′ is equal to about one third. of the AP dimension of the recess. The total height of the prosthesis is slightly less than that of the first illustrative embodiment. Nonetheless, it affords a high level of lateral stability.

Claims (11)

1. A spinal implant, comprising:
a first connection plate having a first surface dimensioned to contact a first vertebral body, a second surface opposite the first surface, and a generally spherical hinge extending from the second surface;
a second connection plate having a first surface dimensioned to contact a second vertebral body, a second surface opposite the first surface, and a walled section extending from the second surface to define a receiving area; and
a hinge core dimensioned to be received at least partially within the receiving area of the second connection plate, the hinge core including an opening and a generally spherical depression extending from the opening, wherein the opening is dimensioned to be elastically deformed to allow the generally spherical hinge of the first connection plate to pass through the opening and into the generally spherical depression.
2. The spinal implant of claim 1, wherein at least one of first and second connection plate includes a flange disposed generally perpendicularly to the connection plate with at least one aperture to receive a fixation element to aid in affixing the connection plate to the respective vertebral body.
3. The spinal implant of claim 1, wherein the hinge core includes a base portion and a collar, the base portion positioned within the receiving area of the second connection plate and the collar extending radially outward from the base portion.
4. The spinal implant of claim 1, wherein the hinge core is made of a non-metal material.
5. The spinal implant of claim 1, wherein the walled section of the receiving area is rectangular.
6. The spinal implant of claim 1, wherein the walled section of the receiving area is square.
7. The spinal implant of claim 1, wherein the walled section of the receiving area is square, and the hinge core is dimensioned with one pair of sides which has a side length substantially corresponding to a side length of the receiving area, and one pair of sides which has a shorter side length than the side length of the receiving area.
8. The spinal implant of claim 1, wherein the walled section of the receiving area is square, and the hinge core is dimensioned with sides that have a shorter side length than the receiving area.
9. The spinal implant of claim 1, wherein the walled section of the receiving area and the hinge core have substantially the same dimensions.
10. The spinal implant of claim 1, wherein the hinge core lies substantially completely inside the receiving area.
11. The spinal implant of claim 1, wherein the generally spherical depression of the hinge core encloses the generally spherical hinge of the first connection plate within an enclosure angle of more than 180°.
US13/327,589 2005-01-26 2011-12-15 Cervical intervertebral prosthesis Abandoned US20120083891A1 (en)

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US11/125,312 US8088164B2 (en) 2005-01-26 2005-05-10 Cervical intervertebral prosthesis
US13/327,589 US20120083891A1 (en) 2005-01-26 2011-12-15 Cervical intervertebral prosthesis

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2532126A (en) * 2014-09-24 2016-05-11 Fitzbionics Ltd A prosthetic intervertebral disc joint assembly

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7771479B2 (en) 2004-01-09 2010-08-10 Warsaw Orthopedic, Inc. Dual articulating spinal device and method
US20050171608A1 (en) 2004-01-09 2005-08-04 Sdgi Holdings, Inc. Centrally articulating spinal device and method
US7811327B2 (en) * 2005-04-21 2010-10-12 Globus Medical Inc. Expandable vertebral prosthesis
US7811326B2 (en) 2006-01-30 2010-10-12 Warsaw Orthopedic Inc. Posterior joint replacement device
US8864832B2 (en) 2007-06-20 2014-10-21 Hh Spinal Llc Posterior total joint replacement
US10821003B2 (en) 2007-06-20 2020-11-03 3Spline Sezc Spinal osteotomy
DE102007038996B4 (en) * 2007-08-17 2015-03-19 Burkhard Rischke Facet joint prosthesis
GB2471133A (en) * 2009-06-19 2010-12-22 Karin Buettner-Janz Intervertebral disc prosthesis with modular construction
CN101627931B (en) * 2009-08-06 2010-12-01 雷伟 Artificial cervical complex joint
US8496713B2 (en) 2010-12-10 2013-07-30 Globus Medical, Inc. Spine stabilization device and methods
KR101286070B1 (en) * 2012-02-22 2013-07-15 (주)티디엠 Prosthesis of intervertebral disc for cervical spine
US10478097B2 (en) 2013-08-13 2019-11-19 Innovative Surgical Solutions Neural event detection
US10478096B2 (en) 2013-08-13 2019-11-19 Innovative Surgical Solutions. Neural event detection
US10449002B2 (en) 2013-09-20 2019-10-22 Innovative Surgical Solutions, Llc Method of mapping a nerve
US10376209B2 (en) 2013-09-20 2019-08-13 Innovative Surgical Solutions, Llc Neural locating method
US10376208B2 (en) 2013-09-20 2019-08-13 Innovative Surgical Solutions, Llc Nerve mapping system
CN104958125B (en) * 2015-07-24 2016-09-28 天津市第四中心医院 Frame-type non-fusion technology artificial vertebral body
US10321833B2 (en) 2016-10-05 2019-06-18 Innovative Surgical Solutions. Neural locating method
US10869616B2 (en) 2018-06-01 2020-12-22 DePuy Synthes Products, Inc. Neural event detection
US10870002B2 (en) 2018-10-12 2020-12-22 DePuy Synthes Products, Inc. Neuromuscular sensing device with multi-sensor array
EP3876873A4 (en) * 2018-11-09 2022-08-10 Marc Peterman Intervertebral spinal implant and surgical methods
US11399777B2 (en) 2019-09-27 2022-08-02 DePuy Synthes Products, Inc. Intraoperative neural monitoring system and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258031A (en) * 1992-01-06 1993-11-02 Danek Medical Intervertebral disk arthroplasty
US5755796A (en) * 1996-06-06 1998-05-26 Ibo; Ivo Prosthesis of the cervical intervertebralis disk
US5782923A (en) * 1996-05-22 1998-07-21 Gmt Gesellschaft Fuer Medizinische Technik Mbh Endoprosthesis for an elbow joint
US6368350B1 (en) * 1999-03-11 2002-04-09 Sulzer Spine-Tech Inc. Intervertebral disc prosthesis and method

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5425773A (en) * 1992-01-06 1995-06-20 Danek Medical, Inc. Intervertebral disk arthroplasty device
DE4208116C2 (en) * 1992-03-13 1995-08-03 Link Waldemar Gmbh Co Intervertebral disc prosthesis
US5683465A (en) * 1996-03-18 1997-11-04 Shinn; Gary Lee Artificial intervertebral disk prosthesis
US5895428A (en) 1996-11-01 1999-04-20 Berry; Don Load bearing spinal joint implant
US6146421A (en) * 1997-08-04 2000-11-14 Gordon, Maya, Roberts And Thomas, Number 1, Llc Multiple axis intervertebral prosthesis
US5899941A (en) * 1997-12-09 1999-05-04 Chubu Bearing Kabushiki Kaisha Artificial intervertebral disk
US5989291A (en) * 1998-02-26 1999-11-23 Third Millennium Engineering, Llc Intervertebral spacer device
US6660039B1 (en) 1998-05-20 2003-12-09 Smith & Nephew, Inc. Mobile bearing knee prosthesis
US6113637A (en) * 1998-10-22 2000-09-05 Sofamor Danek Holdings, Inc. Artificial intervertebral joint permitting translational and rotational motion
DE10036290A1 (en) 2000-07-26 2002-02-07 Bosch Gmbh Robert Device for determining at least one parameter of a flowing medium
US6989032B2 (en) * 2001-07-16 2006-01-24 Spinecore, Inc. Artificial intervertebral disc
US7575576B2 (en) * 2001-07-16 2009-08-18 Spinecore, Inc. Wedge ramp distractor and related methods for use in implanting artificial intervertebral discs
FR2824261B1 (en) * 2001-05-04 2004-05-28 Ldr Medical INTERVERTEBRAL DISC PROSTHESIS AND IMPLEMENTATION METHOD AND TOOLS
US7160327B2 (en) 2001-07-16 2007-01-09 Spinecore, Inc. Axially compressible artificial intervertebral disc having limited rotation using a captured ball and socket joint with a solid ball and compression locking post
US6706068B2 (en) * 2002-04-23 2004-03-16 Bret A. Ferree Artificial disc replacements with natural kinematics
US20030229394A1 (en) * 2002-06-06 2003-12-11 Ogle Matthew F. Processed tissue for medical device formation
US6770095B2 (en) * 2002-06-18 2004-08-03 Depuy Acroned, Inc. Intervertebral disc
US6899735B2 (en) * 2002-10-02 2005-05-31 Sdgi Holdings, Inc. Modular intervertebral prosthesis system
CA2502292C (en) * 2002-10-31 2011-07-26 Spinal Concepts, Inc. Movable disc implant
DE20313183U1 (en) * 2003-08-22 2003-10-16 Aesculap Ag & Co Kg Intervertebral implant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258031A (en) * 1992-01-06 1993-11-02 Danek Medical Intervertebral disk arthroplasty
US5782923A (en) * 1996-05-22 1998-07-21 Gmt Gesellschaft Fuer Medizinische Technik Mbh Endoprosthesis for an elbow joint
US5755796A (en) * 1996-06-06 1998-05-26 Ibo; Ivo Prosthesis of the cervical intervertebralis disk
US6368350B1 (en) * 1999-03-11 2002-04-09 Sulzer Spine-Tech Inc. Intervertebral disc prosthesis and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2532126A (en) * 2014-09-24 2016-05-11 Fitzbionics Ltd A prosthetic intervertebral disc joint assembly
GB2532126B (en) * 2014-09-24 2017-07-12 Fitzbionics Ltd A prosthetic intervertebral disc joint assembly
US11844699B2 (en) 2014-09-24 2023-12-19 Fitzbionics Limited Method of making a prosthetic intervertebral disc joint assembly

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JP4551929B2 (en) 2010-09-29
US20060167552A1 (en) 2006-07-27

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