WO1995015132A1 - Implant orthopedique - Google Patents

Implant orthopedique Download PDF

Info

Publication number
WO1995015132A1
WO1995015132A1 PCT/US1994/013793 US9413793W WO9515132A1 WO 1995015132 A1 WO1995015132 A1 WO 1995015132A1 US 9413793 W US9413793 W US 9413793W WO 9515132 A1 WO9515132 A1 WO 9515132A1
Authority
WO
WIPO (PCT)
Prior art keywords
flange
bone
implant
acetabular cup
teeth
Prior art date
Application number
PCT/US1994/013793
Other languages
English (en)
Inventor
John Egan
Original Assignee
Minnesota Mining And Manufacturing Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Minnesota Mining And Manufacturing Company filed Critical Minnesota Mining And Manufacturing Company
Publication of WO1995015132A1 publication Critical patent/WO1995015132A1/fr

Links

Classifications

    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • 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
    • 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
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30136—Rounded shapes, e.g. with rounded corners undulated or wavy, e.g. serpentine-shaped or zigzag-shaped
    • 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
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322—The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • 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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30487—Circumferential cooperating grooves and beads on cooperating lateral surfaces of a mainly longitudinal connection
    • 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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305—Snap connection
    • 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
    • A61F2002/30576—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • A61F2002/30578—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
    • 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
    • A61F2002/30795—Blind bores, e.g. of circular cross-section
    • A61F2002/30805—Recesses of comparatively large area with respect to their low depth
    • 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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • 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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30868—Square, rectangular or rhomboidal threads
    • 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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30873—Threadings machined on non-cylindrical external surfaces
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3429—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3429—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
    • A61F2002/3432—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line having apertures for receiving fixation screws
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2250/0026—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 differing in surface structures
    • 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
    • A61F2310/00023—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
    • A61F2310/00161—Carbon; Graphite
    • 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

Definitions

  • ORTHOPEDIC IMPIANT This invention relates to an orthopedic prosthetic joint implant used to replace damaged or worn out joints.
  • Co-assigned U.S. Patent No. 5,217,499 discloses a rim-bearing acetabular component of a hip joint prosthesis.
  • the component includes a continuous, circumferential rim that is adapted to contact the prepared rim of the acetabulum of the patient. That prosthesis is held in position by bone screws or cement.
  • Co-assigned U.S. Patent No. 4,997,447 discloses a screw-threaded acetabular component of a hip joint prosthesis.
  • the metal cup shell of that prosthesis includes an external self-tapping thread extending around the shell to hold the prosthesis in position in bone.
  • Co-assigned U.S. Patent No. 5,080,677 discloses an acetabular component of a hip joint prosthesis. That acetabular component includes a metal cup shell and plastic insert for receiving the ball of a femoral hip stem.
  • cemented acetabular cups examples include the plastic acetabular cups shown in British Patent Application No. 2,134,360; British Patent No. 1,563,334 and U.S. Patent No. 4,327,449.
  • British Patent No. 2,134,360 shows a polyethylene acetabular cup having a gapped perimeter that would be cemented into position in bone.
  • Such plastic acetabular cups are cemented in place, and are not designed for cementless fixation to bone.
  • an acetabular implant into the pelvis for a hip replacement may comprise a cup surrounded by a flange which rests on the exposed surface of the prepared bone whilst the cup sits in or is screwed into a prepared recess in the bone. See, e.g., co-assigned U.S. Patent No. 5,217,499 (Shelley) . It is over the flange of such acetabular cups that the bony overgrowth has been found to occur.
  • this invention involves a novel orthopedic prosthetic implant and method in which such bony overgrowth is used to further assist in the fixing and stabilization of the implant.
  • the invention provides an implant that is adapted for cementless affixation in a recess prepared in bone, with the recess in the bone being prepared with a generally flat bone surface surrounding the recess. It is now believed that a relatively thin flange (e.g., less than 3mm thick) having an undulating or scalloped edge facilitates such bony overgrowth. It is also believed that cement should be avoided adjacent such a flange.
  • a novel orthopedic prosthetic implant comprises a support body adapted to be affixed in the recess prepared in the bone without cement, and a flange integral with the support body and extending outwardly from the support body.
  • the flange has a generally flat surface arranged to rest on the surface of the bone surrounding the recess.
  • the flange has an undulating or scalloped edge that defines a width of the flange as varying in a direction around the support body, whereby bony overgrowth over the edge of the flange will trap the flange and so prevent its removal and will also prevent rotation of the flange and implant.
  • the support body and flange are integrally formed of material selected from the group comprising metal, graphite and ceramic material.
  • the support body may comprise a metal cup shell of an acetabular cup, with the flange extending radially or laterally outwardly from the opening of the acetabular cup.
  • the prosthetic acetabular cup of the invention comprises a metal cup shell having a generally convex outer surface adapted to be affixed in the recess in the bone without cement, a generally concave inner surface, and a rim defining an opening to the inner surface.
  • a metal flange is provided that is integral with the metal cup shell and extends outwardly from adjacent the rim of the metal cup shell.
  • the metal flange has a generally flat surface arranged to rest on the surface of the bone surrounding the recess.
  • the flange has an undulating or scalloped edge that defines a width of the flange as varying in a direction around the metal cup shell, whereby bony overgrowth over the edge of the flange will trap the flange and so prevent its removal and will also prevent rotation of the flange and thus the acetabular cup.
  • Cementless means is provided in addition to the flange for affixing the acetabular cup to bone.
  • the undulating or scalloped edge of the flange defines a plurality of spaced-apart, teeth-like extensions extending laterally outwardly with respect to the cup shell.
  • Such spaced-apart, teeth-like extensions each may conveniently have a through hole for receiving a bone screw to affix the acetabular cup to bone, in which case the cementless means may comprise a plurality of bone screws received in the through holes in the teeth-like extensions.
  • the spaced-apart, teeth-like extensions are separated from each other by generally rounded, concave edge portions defining the edge of the flange between the teeth-like extensions, the arrangement tending to encourage bony overgrowth adjacent the concave edge portions that tends to prevent rotation of the acetabular cup.
  • the plurality of spaced-apart, teeth-like extensions comprise at least six teeth-like extensions, with all but two of the teeth-like extensions being equally spaced apart, with the spacing between said two teeth-like extensions being substantially greater than the spacing between the other teeth-like extensions.
  • the flange has a thickness no greater than 3mm.
  • the cup shell and flange are formed of material selected from the group comprising metal, graphite and ceramic material.
  • the cup shell is formed of metal, particularly titanium or titanium alloy.
  • a bearing insert formed of synthetic resin material is provided for use with a metal cup shell.
  • the bearing insert is closely received in the cup shell adjacent the inner surface of the cup shell.
  • the bearing insert has a generally concave, generally hemispherical cavity adapted to receive a head of a femoral component of a hip prosthesis.
  • the cementless means may conveniently comprise a plurality of bone screws adapted to be screwed through the acetabular cup into bone.
  • the bone screws may be received in through holes through the cup shell or through the flange.
  • other suitable cementless means may be employed, such as other mechanical fastening means.
  • the cementless means may comprise threaded means formed along the outer surface of the cup shell.
  • a third aspect of the invention involves a method of using an implant.
  • the method generally comprises the following steps: (a) providing an orthopedic prosthetic implant comprising a support body adapted to be affixed in the recess prepared in the bone without cement; and a flange integral with the support body and extending outwardly from the support body, the flange having a generally flat . surface arranged to rest on the surface of the bone surrounding the recess, the flange having an undulating or scalloped edge that defines a width of the flange as varying in a direction around the support body;
  • the invention does extend to other implants, in addition to acetabular cups, where there is potentially a thin and relatively flattish surface interfacing closely with either cut surface of the bone or healthy cortical bone surface.
  • Such interfaces may be achieved on the collars of femoral or humeral components against the cut calcar of the femoral or humeral neck or on bone plates in close apposition to the cortical bone.
  • the bone/implant interfaces of distal femoral knee implants and tibial implants may also be provided with suitable flanges to bring them into accordance with the invention. Further details of the invention are defined in the features of the claims.
  • Figure 1 is a plan view of an orthopedic prosthetic implant of the invention, represented by way of example, as a metal cup shell of a prosthetic acetabular cup.
  • Figure 2 is a cross-sectional view of the prosthetic acetabular cup of figure 1 also including a bearing insert of synthetic resin material; and
  • Figure 3 is a side elevational view of a second embodiment of the invention, in which screw threads are provided on the outer surface of the acetabular cup.
  • figure 1 shows an outer metal cup shell 10 forming part of an acetabular cup component of a hip joint prosthesis.
  • An implant according to this invention could take the form of other orthopedic prosthetic joint implants, such as for example a femoral hip stem or the humoral component of a shoulder prosthesis.
  • the implant 10 according to this invention preferably is made from metal, and in particular titanium or titanium based alloys.
  • an implant according to the invention can be made of other metals, graphite or ceramics, so long as they are suitable for cementless affixation to bone.
  • the bearing insert 32 is formed of synthetic resin material ("plastics material”) , such as thermoplastic or thermoset material, and preferably ultra high molecular weight polyethylene.
  • plastics material such as thermoplastic or thermoset material
  • the shell 10 has a cavity 12 for the bearing insert 32. Near the bottom of the cavity 12 are provided holes 14, e.g., three as shown, through which suitable screws 25 can pass to fix the implant 10 into a prepared cavity in the bone.
  • a small circular recess 16 is provided in the base of the cavity 12 to receive a corresponding shaped projecting spigot on the bearing inset 32 to locate this positively in place.
  • Co-assigned U.S. Patent No. 5,217,499 (Shelley) discloses a rim-bearing acetabular component including suitable bone screws.
  • the shell 12 has around its upper edge a thin integral flange 20.
  • the flange 20 has a width which is not constant and in fact is of scalloped shape as viewed in the direction of the open face of the shell 12. In the example shown there are six scallops 22, although the flange could be provided with a different number of scallops 22. Between each of the scallops in the widest part of the flange 20 are holes 24 for small screws for initially fixing the flange 20 to bone.
  • the widest parts of the flange 20 may take the form of generally spaced-apart, teeth-like extensions as shown in figure 1, and the scallops 22 may take the form of generally concave arcuate or rounded edge portions 22.
  • the flange 20 and the bone surface against which it is to rest should be as flat as possible so that the two can be in close and firm contact. In this way the flange 20 will press on the bone surface and this pressure will promote the bony overgrowth.
  • the flange 20 should be as thin as possible commensurate with maintaining satisfactory mechanical properties. Generally, therefore, the flange 20 should be no thicker than 3mm and preferably from 1 to 2mm.
  • the flange 20 will normally be substantially circular with the edge of the flange forming a generally an undulating or scalloped shape.
  • the undulations or scalloping provides the required variation in the width of the flange 20, so preventing rotation of the implant 10 once the bone has grown over the edge of the flange 20.
  • FIG. 3 illustrates an alternate embodiment of the acetabular cup, herein designated 40, which is similar in most respects to acetabular cup 10.
  • Acetabular cup 40 includes an external, self-tapping screw thread 44.
  • Acetabular cup 40 includes a flange 42 that is substantially identical to the flange 20 of metal cup shell 10.
  • Co-assigned U.S. Patent No. 4,997,447 discloses a suitable external, self-tapping screw thread on an acetabular cup.
  • an advantage of an implant 10 or 40 according to the invention over one having a porous surface or coating to promote bony ingrowth is that the expensive porous surface can be avoided.
  • a porous surface of coating could be combined with this invention.
  • the porous surface disclosed in U.S. Patent Nos. 4,608,052 and 4,673,409 could be employed in an implant having a flange with a scalloped edge.
  • Another example of a suitable porous surface is shown in British Patent No. 2,181,354.
  • the implant 10 or 40 can be machined to provide the required flange 20 or 42 as part of the normal manufacturing procedure for the implant 10 or 40 so reducing the cost of the implant 10 or 40 whilst still retaining the advantages of non-cemented stabilization.

Abstract

On décrit un implant orthopédique prothétique, tel qu'une coupe acétabulaire ou une tige de hanche fémorale, pourvu d'une bride (20; 42) dont le périmètre (22) présente une forme ondulée ou échancrée. L'implant est destiné à être implanté sans colle, et le périmètre (22) de forme ondulée ou échancrée autorise la croissance osseuse assurant le blocage en position de l'implant et empêchant sa rotation. On peut également utiliser des fixations mécaniques, telles que des vis (25) ou des fils (44), sur la surface externe d'une coupe acétabulaire.
PCT/US1994/013793 1993-12-03 1994-12-02 Implant orthopedique WO1995015132A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9324864.9 1993-12-03
GB939324864A GB9324864D0 (en) 1993-12-03 1993-12-03 Joint implants

Publications (1)

Publication Number Publication Date
WO1995015132A1 true WO1995015132A1 (fr) 1995-06-08

Family

ID=10746115

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/013793 WO1995015132A1 (fr) 1993-12-03 1994-12-02 Implant orthopedique

Country Status (2)

Country Link
GB (1) GB9324864D0 (fr)
WO (1) WO1995015132A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039702A1 (fr) * 1996-04-22 1997-10-30 Hoermansdoerfer Gerd Cavite glenoide de l'articulation de la hanche avec un filet special
US7485148B2 (en) 2004-04-20 2009-02-03 Finsbury (Development) Limited Prosthesis
FR2961090A1 (fr) * 2010-06-10 2011-12-16 C2F Implants Ensemble d'elements destines a former un implant cotyloidien
US8859756B2 (en) 2010-03-31 2014-10-14 Gilead Pharmasset Llc Stereoselective synthesis of phosphorus containing actives
CN112370216A (zh) * 2020-10-29 2021-02-19 北京市春立正达医疗器械股份有限公司 一种髋臼垫块

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916891A1 (de) * 1988-05-30 1989-12-07 Copf Franz Hueftgelenkspfannen-prothese
US4904265A (en) * 1988-09-09 1990-02-27 Boehringer Mannheim Corporation Cementless acetabular implant
EP0359700A1 (fr) * 1988-08-24 1990-03-21 GebràœDer Sulzer Aktiengesellschaft Coque acétabulaire en deux parties
US5217499A (en) * 1988-08-17 1993-06-08 Minnesota Mining And Manufacturing Company Rim-bearing acetabular component of hip joint prosthesis

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916891A1 (de) * 1988-05-30 1989-12-07 Copf Franz Hueftgelenkspfannen-prothese
US5217499A (en) * 1988-08-17 1993-06-08 Minnesota Mining And Manufacturing Company Rim-bearing acetabular component of hip joint prosthesis
EP0359700A1 (fr) * 1988-08-24 1990-03-21 GebràœDer Sulzer Aktiengesellschaft Coque acétabulaire en deux parties
US4904265A (en) * 1988-09-09 1990-02-27 Boehringer Mannheim Corporation Cementless acetabular implant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039702A1 (fr) * 1996-04-22 1997-10-30 Hoermansdoerfer Gerd Cavite glenoide de l'articulation de la hanche avec un filet special
US7485148B2 (en) 2004-04-20 2009-02-03 Finsbury (Development) Limited Prosthesis
US8859756B2 (en) 2010-03-31 2014-10-14 Gilead Pharmasset Llc Stereoselective synthesis of phosphorus containing actives
FR2961090A1 (fr) * 2010-06-10 2011-12-16 C2F Implants Ensemble d'elements destines a former un implant cotyloidien
CN112370216A (zh) * 2020-10-29 2021-02-19 北京市春立正达医疗器械股份有限公司 一种髋臼垫块

Also Published As

Publication number Publication date
GB9324864D0 (en) 1994-01-19

Similar Documents

Publication Publication Date Title
US6682566B2 (en) Modular socket prosthesis
JP4057068B2 (ja) 寛骨臼カップ用ロック機構
US7323013B2 (en) Differential porosity prosthetic hip system
US6908486B2 (en) Modular acetabular anti-protrusio cage and porous ingrowth cup combination
EP1290992B1 (fr) Cupule cotyloidienne
US5004476A (en) Porous coated total hip replacement system
US7169185B2 (en) Canine acetabular cup
EP0948298B1 (fr) Prothese acetabulaire de type annulaire renforcee de contre-boutants
US6811569B1 (en) Expansible acetabular prosthesis with double mobility
AU2004203341B2 (en) Hip prosthesis with a modular acetabular cup assembly
AU2010239614C1 (en) Acetabular cup
US7402177B2 (en) Polymeric acetabular cup
US20070043448A1 (en) Intrinsic stability in a total hip stem
US20020120342A1 (en) Method and apparatus for acetabular reconstruction
US6527808B1 (en) Constrained socket for use with a ball-and-socket joint
US20020147499A1 (en) Locking systems for implants
EP1722719A2 (fr) Doublure universelle
EP1900344A2 (fr) Elément de tête fémorale de resurfaçage
US20150039093A1 (en) Differential porosity prosthetic system
US20230023358A1 (en) Coating for an implant
EP3484414B1 (fr) Dispositifs et procédés pour cimenter un revêtement de support d'insertion dans un composant de cotyle acétabulaire
US20090248168A1 (en) Prosthesis
WO1995015132A1 (fr) Implant orthopedique

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase