WO2005084590A1 - Spinal prosthesis - Google Patents
Spinal prosthesis Download PDFInfo
- Publication number
- WO2005084590A1 WO2005084590A1 PCT/IL2004/000675 IL2004000675W WO2005084590A1 WO 2005084590 A1 WO2005084590 A1 WO 2005084590A1 IL 2004000675 W IL2004000675 W IL 2004000675W WO 2005084590 A1 WO2005084590 A1 WO 2005084590A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- articulating
- attachment
- articulation
- contour
- members
- Prior art date
Links
- 241001272720 Medialuna californiensis Species 0.000 claims description 3
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 claims 1
- 241000234295 Musa Species 0.000 description 4
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910000914 Mn alloy Inorganic materials 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229910001257 Nb alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 206010038967 Retrograde ejaculation Diseases 0.000 description 1
- 208000024248 Vascular System injury Diseases 0.000 description 1
- 208000012339 Vascular injury Diseases 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- YCZYIXDZUXEZQD-UHFFFAOYSA-N [Cr].[Mn].[Co] Chemical compound [Cr].[Mn].[Co] YCZYIXDZUXEZQD-UHFFFAOYSA-N 0.000 description 1
- WHROWQPBDAJSKH-UHFFFAOYSA-N [Mn].[Ni].[Cr] Chemical compound [Mn].[Ni].[Cr] WHROWQPBDAJSKH-UHFFFAOYSA-N 0.000 description 1
- HNYSBSMSUWPWOM-UHFFFAOYSA-N [Ni].[W].[Cr].[Co] Chemical compound [Ni].[W].[Cr].[Co] HNYSBSMSUWPWOM-UHFFFAOYSA-N 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000002917 arthritic effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002695 general anesthesia Methods 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- 239000000602 vitallium Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
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- 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
- A61F2/4425—Intervertebral or spinal discs, e.g. resilient made of articulated components
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- 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
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- 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
- A61F2002/3006—Properties of materials and coating materials
- A61F2002/30069—Properties of materials and coating materials elastomeric
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- 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
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30125—Rounded shapes, e.g. with rounded corners elliptical or oval
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- 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
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- 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
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- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
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- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30563—Special structural features of bone or joint prostheses not otherwise provided for having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
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- 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
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- 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
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- 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
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- 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
- A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
-
- 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
- A61F2310/00035—Other metals or alloys
- A61F2310/00089—Zirconium or Zr-based alloys
-
- 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
- A61F2310/00035—Other metals or alloys
- A61F2310/00095—Niobium or Nb-based alloys
-
- 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
- A61F2310/00179—Ceramics or ceramic-like structures
- A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
- A61F2310/00203—Ceramics or ceramic-like structures based on metal oxides containing alumina or aluminium oxide
-
- 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
- A61F2310/00179—Ceramics or ceramic-like structures
- A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
- A61F2310/00239—Ceramics or ceramic-like structures based on metal oxides containing zirconia or zirconium oxide ZrO2
-
- 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
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
- A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
Definitions
- a typical disc replacement unit is approximately 30 millimeters in diameter ⁇ This relatively large cross-section usually necessitates a mostly anterior retroperitoneal (from the front of the abdomen but staying outside the intestinal sac) approach to the spine which may be risky. The risks of general anesthesia are coupled with risks of vascular injury and retrograde ejaculation in males.
- an endoprosthesis including a first articulating member formed with a generally concave articulating surface, and a second articulating member formed with a generally convex articulating surface which articulates with the concave articulating surface, the first and second articulating members each having a generally planar attachment surface for attachment to spine structure, wherein the first articulating member includes a contour defined by a cutting surface that cuts through a portion of the first articulating member at a non-zero angle relative to its attachment surface, and the second articulating member includes a contour defined by a cutting surface that cuts through a portion of the second articulating member at a non-zero angle relative to its attachment surface.
- the endoprosthesis can include one or more of the following features.
- the contours may be defined by cutting a sphere.
- the cutting surfaces may define a "half-moon" shaped contour, a rectangular contour, a cylindrical contour, a bullet- shaped contour, a trapezoidal contour, an oval contour and/or a semi-toroidal contour.
- the radii of curvature of the first and second articulating members may or may not generally match.
- the contact areas of the first and second articulating members may or may not generally match.
- One of the articulating members may include an articulating portion mounted in a recess formed in an attachment portion.
- one of the articulating members may include an attachment portion mounted in a recess formed in an articulating portion.
- the attachment surfaces may include protrusions to improve attachment to the spine structure.
- the first articulation member may include a plurality of bulbous articulation surfaces which articulate with the second articulation member.
- An elastomeric member may be positioned between the first and second articulation members.
- One of the articulation members may include a varying height element whose protrusion from its attachment surface is adjustable.
- an endoprosthesis including first and second articulating members formed with generally planar attachment surfaces on their outer surfaces that articulate against a third articulation member on their inner surfaces, the first and second articulating members each having a generally planar attachment surface for attachment to spine structure, wherein the first articulating member includes a contour defined by a cutting surface that cuts through a portion of the first articulating member at a non-zero angle relative to its attachment surface, and the second articulating member includes a contour defined by a cutting surface that cuts through a portion of the second articulating member at a non-zero angle relative to its attachment surface.
- Figs. 1A and IB are simplified perspective top view and exploded view illustrations, respectively, of an endoprosthesis, constructed and operative in accordance with an embodiment of the present invention
- Fig. 2 is an axis diagram of a sphere from which contours of the endoprosthesis of Figs. 1 A and IB may be cut in accordance with an embodiment of the present invention
- Figs. 1A and IB are simplified perspective top view and exploded view illustrations, respectively, of an endoprosthesis, constructed and operative in accordance with an embodiment of the present invention
- Fig. 2 is an axis diagram of a sphere from which contours of the endoprosthesis of Figs. 1 A and IB may be cut in accordance with an embodiment of the present invention
- FIGS. 3A-3G are simplified illustrations of various shapes of articulating members of the endoprosthesis of the present invention, which may be fashioned from a sphere, as seen in the cross-section taken along the x-y plane;
- Figs. 4A- 4E are side section views of embodiments of the present invention, as seen in the section taken along the y-z plane;
- Figs. 5A-5F are examples of cutting shapes that can create the shapes seen in Figs. 3A-3G, as viewed along the z axis;
- Figs. 6A-6C are simplified illustrations of an endoprosthesis, constructed and operative in accordance with another embodiment of the present invention, wherein two articulation members articulate against a third articulation member;
- FIGS. 7A-7C are simplified illustrations of an endoprosthesis, constructed and operative in accordance with yet another embodiment of the present invention, which may be similar in construction to the endoprosthesis of Figs. 6A-6C, except that the third articulation member may be constructed as a hollow member;
- Figs. 8A-8C are simplified illustrations of an endoprosthesis, constructed and operative in accordance with still another embodiment of the present invention, wherein a first articulation member comprises a plurality of bulbous articulation surfaces that articulate with a second articulation member;
- Figs. 9A-9C are simplified illustrations of an embodiment similar to that of Figs. 8A- 8C, but with an additional elastomeric member between the first and second articulation members; and
- FIGS. 10A-10C are simplified illustrations of an endoprosthesis, constructed and operative in accordance with another embodiment of the present invention, wherein one of the articulation members is a varying height element.
- DESCRIPTION OF EMBODIMENTS Reference is now made to Figs. 1A and IB, which illustrate a vertebral disc endoprosthesis 10, constructed and operative in accordance with an embodiment of the present invention.
- Endoprosthesis 10 may be fashioned from any combination of materials used for spinal prostheses, such as but not limited to, ceramic, aluminum oxide, zirconium oxide, metal, metal alloy, cobalt-chromium-tungsten-nickel alloy, cobalt-chromium- manganese alloy, cobalt-chromium alloy, cobalt-chromium-molybdenum alloy, chromium- nickel-manganese alloy, powder metal alloy, 316L stainless steel, Ti 6A1-4V ELI, polymer, polyurethane, polyethylene, wear resistant polyethylene, cross-linked polyethylene, thermoplastic elastomer, biomaterial, polycaprolactone, diffusion hardened material, Ti-13- 13, zirconium alloy, niobium alloy, with or without a porous coating system, hydrophilic coating system, hydroxyapatite coating system, and tri-calcium phosphate coating system.
- materials used for spinal prostheses such as but not limited to, ceramic, aluminum oxide, zirconium oxide, metal
- Endoprosthesis 10 may be made from at least two or more parts wherein there are two articulating parts.
- endoprosthesis 10 may include a first articulating member 12 formed with a generally concave articulating surface 14, and a second articulating member 16 formed with a generally convex articulating surface 18 which articulates with concave articulating surface 14.
- the first and second articulating members 12 and 16 may have generally planar attachment surfaces 20 and 22, respectively, for attachment to structure of the spine.
- the attachment surface 20 may be generally flat, being defined by a plane 24 (e.g., a horizontal plane) that cuts through and truncates a portion of first articulating member 12 distanced from articulating surface 14.
- the attachment surface 22 may be generally flat, being defined by another plane 26 (e.g., a horizontal plane) that cuts through and truncates a portion of second articulating member 16 distanced from articulating surface 18.
- the attachment surfaces 20 and 22 may include spikes or other protrusions 29 to improve the attachment to the spine structure.
- the first articulating member 12 includes a contour 28 defined by a cutting surface 30 that cuts through another portion of first articulating member 12 at a non-zero angle relative to the plane 24.
- the second articulating member 16 includes a contour 32 defined by a cutting surface 34 that cuts through another portion of second articulating member 16 at a non-zero angle relative to the plane 26.
- the cutting surfaces 30 and 34 may cut a "half-moon” or “banana” shape that defines contours 28 and 32 of first and second articulating members 12 and 16, respectively.
- the contours 28 and 32 of the endoprosthesis 10 may be cut from a sphere or sphere-like shape 40 (referred to simply as sphere 40), shown in Fig. 2.
- the axis diagram of sphere 40 in Fig. 2 assists in understanding the various cross-sections in the figures illustrated hereinbelow.
- Figs. 3A-3G illustrates various shapes of additional embodiments of articulating members 16 that may be fashioned from a sphere 40, as seen in the cross-section taken along plane x-y.
- FIG. 3A shows a rectangular or cylindrical contour.
- Fig. 3B shows a bullet-shaped contour.
- Fig. 3C shows a trapezoidal contour with pointy winged protrusions from the base of the trapezoid.
- Fig. 3D shows an oval or elliptical contour.
- Fig. 3E shows the banana shaped contour as shown in the embodiment of Fig. 1A.
- Fig. 3F shows the banana shaped contour as shown in the embodiment of Fig. 1A, but with a truncated end of the banana shape.
- Fig. 3G shows a semi-toroidal (semi-doughnut) contour.
- first articulating surface 14 of first articulating member 12 may be fashioned to articulate in various degrees of matching opposing surfaces.
- Fig. 4A illustrates a relatively high degree of close matching surfaces (that is, the radii of curvature generally match or are identical and the contact areas also generally match or are identical) with each other along most of their respective articulating surfaces 18 and 14, respectively.
- Fig. 4B illustrates an example of one embodiment wherein respective articulating surfaces 18 and 14 are not closely matching, that is, the radii of curvature do not match.
- FIG. 4C is an illustration of an embodiment wherein articulating surfaces 18 and 14 are closely matching but where the areas of contact between articulating surfaces 18 and 14 are not the same.
- Fig. 4D is an illustration of an embodiment wherein one of the articulating members is constructed of two parts, an articulating portion 41 mounted in a recess 43 formed in an attachment portion 42.
- Fig. 4E is an illustration of an embodiment wherein one of the articulating members is constructed of two parts, an attachment portion 44 mounted in a recess 46 formed in an articulating portion 45.
- FIG. 6A-6C which illustrate an endoprosthesis, constructed and operative in accordance with another embodiment of the present invention.
- two articulation members 50 and 52 with generally planar attachment surfaces on their outer surfaces articulate against a third articulation member 54 on their inner surfaces.
- the inner surfaces of articulation members 50 and 52 are shown as having a convex shape and opposing articulating surfaces of third articulation member 54 have a concave shape. It is to be understood, however, that any combination of opposing concave and convex surfaces according to this embodiment would be in the scope of the present invention.
- Figs. 7A-7C illustrate an endoprosthesis, constructed and operative in accordance with yet another embodiment of the present invention.
- the endoprosthesis of Figs. 7A-7C may be similar in construction to the endoprosthesis of Figs. 6A-6C, except that the third articulation member 54 may be constructed as a hollow member.
- Figs. 8A-8C illustrate an endoprosthesis, constructed and operative in accordance with still another embodiment of the present invention.
- a first articulation member 60 articulates with a second articulation member 62.
- the first articulation member 60 may comprise a plurality of bulbous articulation surfaces 63 which articulate with the generally concave second articulation member 62.
- the plurality of bulbous articulation surfaces 63 may provide additional degrees of rotational or other movement, such as but not limited to, flexion, extension and lateral bending.
- Figs. 9A-9C illustrate an embodiment similar to that of Figs. 8A-8C, but with an additional elastomeric member 66 between first and second articulation members 60 and 62.
- Elastomeric member 66 is configured to add a cushioning effect to endoprosthesis 10.
- Figs. 9A-9C illustrate an embodiment similar to that of Figs. 8A-8C, but with an additional elastomeric member 66 between first and second articulation members 60 and 62.
- Elastomeric member 66 is configured to add a cushioning effect to endoprosthesis
- a first articulation member 70 is attached to or is integrally formed with an attachment member 71.
- a second articulation member 72 is attached to or is integrally formed with a second attachment member 73.
- the second articulation member 72 is a varying height element, that is, its protrusion from second attachment member 73 is adjustable.
- the second articulation member 72 may include a screw which may be screwed up or down into second attachment member 73, thereby enabling adjusting the total thickness of the endoprosthesis. This may be useful as the space between adjacent vertebrae may vary from one individual to another.
Abstract
Description
Claims
Priority Applications (2)
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EP04745015A EP1646338B1 (en) | 2004-03-08 | 2004-07-25 | Spinal prosthesis |
DE602004012109T DE602004012109T2 (en) | 2004-03-08 | 2004-07-25 | SPINE GRAFT |
Applications Claiming Priority (2)
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US55030604P | 2004-03-08 | 2004-03-08 | |
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WO2005084590A1 true WO2005084590A1 (en) | 2005-09-15 |
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PCT/IL2004/000675 WO2005084590A1 (en) | 2004-03-08 | 2004-07-25 | Spinal prosthesis |
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US (1) | US7550009B2 (en) |
EP (1) | EP1646338B1 (en) |
AT (1) | ATE387165T1 (en) |
DE (1) | DE602004012109T2 (en) |
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WO (1) | WO2005084590A1 (en) |
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Also Published As
Publication number | Publication date |
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DE602004012109T2 (en) | 2009-02-19 |
ES2302541T3 (en) | 2008-07-16 |
US20050197705A1 (en) | 2005-09-08 |
ATE387165T1 (en) | 2008-03-15 |
DE602004012109D1 (en) | 2008-04-10 |
EP1646338A1 (en) | 2006-04-19 |
US7550009B2 (en) | 2009-06-23 |
EP1646338B1 (en) | 2008-02-27 |
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