[go: up one dir, main page]

GB2319962A - Artificial Hip Joint Comprising Femoral Stem and Insert - Google Patents

Artificial Hip Joint Comprising Femoral Stem and Insert Download PDF

Info

Publication number
GB2319962A
GB2319962A GB9625153A GB9625153A GB2319962A GB 2319962 A GB2319962 A GB 2319962A GB 9625153 A GB9625153 A GB 9625153A GB 9625153 A GB9625153 A GB 9625153A GB 2319962 A GB2319962 A GB 2319962A
Authority
GB
United Kingdom
Prior art keywords
stem
artificial joint
insert
composite material
joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9625153A
Other versions
GB9625153D0 (en
Inventor
John Stephen Bradley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ORTHODESIGN Ltd
Original Assignee
ORTHODESIGN Ltd
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 ORTHODESIGN Ltd filed Critical ORTHODESIGN Ltd
Priority to GB9625153A priority Critical patent/GB2319962A/en
Publication of GB9625153D0 publication Critical patent/GB9625153D0/en
Publication of GB2319962A publication Critical patent/GB2319962A/en
Withdrawn legal-status Critical Current

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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30965—Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/367—Proximal or metaphyseal parts of shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
    • A61L27/44—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
    • A61L27/443—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix with carbon fillers
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
    • A61F2002/30014—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
    • 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
    • A61F2002/30331—Connections 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
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • 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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30957—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using a positive or a negative model, e.g. moulds
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • 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
    • A61F2220/0033—Connections 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
    • 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
    • A61F2250/0018—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 elasticity, stiffness or compressibility
    • 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
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Epidemiology (AREA)
  • Manufacturing & Machinery (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)

Abstract

There is disclosed an artificial hip joint comprising a stem 2 and a tapered insert 3, the insert having a ball and socket joint 6 mounted thereon or integral thereto and extending into the stem. The stem which is of moulded form comprises a carbon fibre and polymer composite material and has a Young's Modulus that is not more than 40 Gpa but preferably within the range 15-30 Gpa. The carbon fibre content of the composite material is preferably up to 50% by volume and the polymer constituent is a biocompatible polymer such as epoxy, polysulfone or polyetherketone. The insert may be provided with metallic or composite material reinforcement in the upper, neck region thereof and may extend only into the upper region of the stem or may extend to its lower end.

Description

ARTIFICIAL JOINTS This invention relates to artificial joints and is particularly concerned with stems therefor.
The invention has particular application to artificial hip joints.
The invention provides a stem having a lower stiffness (elastic modulus) than stems currently available. This lower stiffness tends to result in a more natural distribution of stresses in the femur, and also reduces stresses in the stem of the implanted artificial joint. These advantages are expected to result in a longer implant life and improved retention of bone stock around the implanted joint.
According to one aspect of the invention, a stem for an artificial joint has a Young's Modulus value of not more than 40 Gpa (Gigapascals).
According to another aspect of the invention, a stem for an artificial joint comprises carbon fibre and polymer composite material.
The composite material preferably has a Young's Modulus value of not more than 40 Gpa, and is desirably in the range of 15 to 30 Gpa.
The polymer constituent of the composite material may comprise one or more of polyetherketone, polyetheretherketone, epoxy, polysulphone or other biocompatible polymer.
The carbon fibre content of the composite material is preferably up to 50% (by volume).
The invention further resides in an artificial joint comprising a combination of the inventive stem (according to either aspect), and an insert extending into said stem.
The insert may extend only into the upper region of the stem, or, alternatively, may extend further, even down to the lower (tip) end of the stem.
The insert may be provided with reinforcement in the upper (neck) region thereof. The reinforcement may be metallic or of plastics composite material incorporating carbon fibres.
The various aspects of the invention will now be described by way of example only with reference to the accompanying drawings, wherein : Figure 1 is a front medial view of an artificial hip joint, and Figure 2 is a side anterior view thereof.
With reference to the figures, an artificial hip joint 1 comprises a stem 2 and an insert 3 extending into the stem for about 50% of its length. The stem has a lower (tip) end 4 and an upper or neck region 5 thereof. The ball 6 of a ball and socket joint is mounted on, (or is integral with), the upper end of the insert 3. The ball 6 may be of metallic or ceramic material.
The insert 3, which is of metallic or carbon fibre composite material, tapers inwardly along its lower (distal) portion.
An alternative form of insert 3 may be fatter in the middle.
The stem 2 is of moulded form and comprises carbon fibre and polymer plastics material having a Young's Modulus value of not more than 40 Gpa, and desirably between 15 to 30 Gpa.
The polymer constituent of the composite material may comprise one or more of polyetherketone, polyetheretherketone, epoxy, polysulphone or other biocompatible polymer.
The carbon fibre content of the composite material is preferably up to 50% (by volume).

Claims (18)

1. A stem for an artificial joint, the stem comprising carbon fibre and polymer composite material.
2. A stem as claimed in claim 1, wherein the composite material has a Young's Modulus value of not more than 40 Gpa (Gigapascals).
3. A stem as claimed in claim 2, wherein the Young's Modulus value is in the range of 15 to 30 Gpa.
4. A stem as claimed in claim 1, 2 or 3, wherein the polymer constituent of the composite material comprises one or more of polyetherketone, polyetheretherketone, epoxy, polysulphone or other biocompatible polymer.
5. A stem as claimed in any one of claims 1 to 4, wherein the carbon fibre content of the composite material is up to 50% (by volume).
6. An artificial joint comprising a combination of the stem claimed in any one of claims 1 to 5, and an insert extending into said stem.
7. An artificial joint as claimed in claim 6, wherein the insert extends only into the upper region of the stem.
8. An artificial joint comprising a combination of the stem claimed in any one of claims 1 to 5, wherein the insert extends beyond the upper region of the stem, towards the lower (tip) end thereof.
9. An artificial joint as claimed in claim 8, wherein the insert extends down to said lower (tip) end of the stem.
10. An artificial joint as claimed in any one of claims 6 to 9, wherein the insert is provided with reinforcement in the upper (neck) region thereof.
11. An artificial joint as claimed in claim 10, wherein the reinforcement is metallic.
123. An artificial joint as claimed in claim 10 wherein the reinforcement comprises plastics composite material incorporating carbon fibres.
13. An artificial joint as claimed in any one of claims 6 to 12, wherein the insert tapers inwardly along its lower (distal) portion.
14. A stem for an artificial joint, as claimed in any one of claims 1 to 5, wherein the joint is an artificial hip joint.
15. An artificial joint, as claimed in any one of claims 6 to 13, comprising an artificial hip joint.
16. A stem for an artificial joint, the stem having a Young's Modulus value of not more than 40 Gpa (Gigapascals).
17. A stem for an artificial joint, substantially as hereinbefore disclosed, with reference to the accompanying drawings.
18. An artificial joint, substantially as hereinbefore disclosed, with reference to the accompanying drawings.
GB9625153A 1996-12-04 1996-12-04 Artificial Hip Joint Comprising Femoral Stem and Insert Withdrawn GB2319962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9625153A GB2319962A (en) 1996-12-04 1996-12-04 Artificial Hip Joint Comprising Femoral Stem and Insert

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9625153A GB2319962A (en) 1996-12-04 1996-12-04 Artificial Hip Joint Comprising Femoral Stem and Insert

Publications (2)

Publication Number Publication Date
GB9625153D0 GB9625153D0 (en) 1997-01-22
GB2319962A true GB2319962A (en) 1998-06-10

Family

ID=10803891

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9625153A Withdrawn GB2319962A (en) 1996-12-04 1996-12-04 Artificial Hip Joint Comprising Femoral Stem and Insert

Country Status (1)

Country Link
GB (1) GB2319962A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1365165A1 (en) * 2002-05-22 2003-11-26 Bioprofile Conical coupling and prosthesis comprising such a coupling
WO2007099307A1 (en) * 2006-03-01 2007-09-07 Invibio Limited Assembly comprising composite materials for bearing surfaces and uses thereof in reconstructive or artificial joints
US8592531B2 (en) 2007-09-11 2013-11-26 Solvay Advanced Polymers, L.L.C. Prosthetic devices
US9907660B2 (en) 2009-06-04 2018-03-06 Howmedica Osteonics Corp. Orthopedic paek-on-polymer bearings

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1580691A (en) * 1976-08-13 1980-12-03 Maschf Augsburg Nuernberg Ag Endoprosthesis for an artificial joint of the human body
WO1985004323A1 (en) * 1984-03-30 1985-10-10 Hexcel Corporation Orthopedic device and method of making the same
EP0171884A1 (en) * 1984-06-15 1986-02-19 Imperial Chemical Industries Plc Prosthetic devices
EP0309363A1 (en) * 1986-04-04 1989-03-29 Claude Demeulenaere Hip prosthesis
WO1991018562A1 (en) * 1990-06-01 1991-12-12 E.I. Du Pont De Nemours And Company Composite orthopedic implant with modulus variations
EP0570172A1 (en) * 1992-05-11 1993-11-18 JOHNSON & JOHNSON ORTHOPAEDICS, INC. Composite prosthesis
GB2268064A (en) * 1992-05-29 1994-01-05 Roozbeh Shirandami Discontinuous fibre composite implant prosthesis
EP0649640A2 (en) * 1993-10-13 1995-04-26 BHC LABORATORIES, Inc. Composite femoral implant having increased neck strength
GB2284830A (en) * 1993-12-15 1995-06-21 Bond Helicopters Limited Sructural member

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1580691A (en) * 1976-08-13 1980-12-03 Maschf Augsburg Nuernberg Ag Endoprosthesis for an artificial joint of the human body
WO1985004323A1 (en) * 1984-03-30 1985-10-10 Hexcel Corporation Orthopedic device and method of making the same
EP0171884A1 (en) * 1984-06-15 1986-02-19 Imperial Chemical Industries Plc Prosthetic devices
EP0309363A1 (en) * 1986-04-04 1989-03-29 Claude Demeulenaere Hip prosthesis
WO1991018562A1 (en) * 1990-06-01 1991-12-12 E.I. Du Pont De Nemours And Company Composite orthopedic implant with modulus variations
EP0570172A1 (en) * 1992-05-11 1993-11-18 JOHNSON & JOHNSON ORTHOPAEDICS, INC. Composite prosthesis
GB2268064A (en) * 1992-05-29 1994-01-05 Roozbeh Shirandami Discontinuous fibre composite implant prosthesis
EP0649640A2 (en) * 1993-10-13 1995-04-26 BHC LABORATORIES, Inc. Composite femoral implant having increased neck strength
GB2284830A (en) * 1993-12-15 1995-06-21 Bond Helicopters Limited Sructural member

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1365165A1 (en) * 2002-05-22 2003-11-26 Bioprofile Conical coupling and prosthesis comprising such a coupling
FR2840039A1 (en) * 2002-05-22 2003-11-28 Bioprofile CONICAL COUPLING AND PROSTHESIS COMPRISING SUCH A COUPLING
US6997958B2 (en) 2002-05-22 2006-02-14 Bioprofile Conical coupling and prosthesis comprising such a coupling
WO2007099307A1 (en) * 2006-03-01 2007-09-07 Invibio Limited Assembly comprising composite materials for bearing surfaces and uses thereof in reconstructive or artificial joints
US8592531B2 (en) 2007-09-11 2013-11-26 Solvay Advanced Polymers, L.L.C. Prosthetic devices
US9144628B2 (en) 2007-09-11 2015-09-29 Solvay Specialty Polymers Usa, Llc Prosthetic devices
US9539361B2 (en) 2007-09-11 2017-01-10 Solvay Specialty Polymers Usa, L.L.C. Prosthetic devices
US9907660B2 (en) 2009-06-04 2018-03-06 Howmedica Osteonics Corp. Orthopedic paek-on-polymer bearings
US12076246B2 (en) 2009-06-04 2024-09-03 Howmedica Osteonics Corp. Orthopedic PAEK-on-polymer bearings

Also Published As

Publication number Publication date
GB9625153D0 (en) 1997-01-22

Similar Documents

Publication Publication Date Title
US4012796A (en) Interpositioning collar for prosthetic bone insert
US5176712A (en) Endoprostheses with resorption preventing means
EP0591171B1 (en) Porous coated prosthesis
EP0532585B1 (en) Metal/composite hybrid orthopedic implants
US5201881A (en) Joint prosthesis with improved shock absorption
US4536894A (en) Hip prosthesis with flared porous bony ingrowth pads
US4714467A (en) Reinforced fiber bone replacement implant having treated surfaces and a method for its manufacture
FI83387C (en) Femoral hip replacement
AU2018202131B2 (en) Femoral component for an implantable hip prosthesis
EP0432141A3 (en) A femoral stem for permanent implantation into the natural femur
US8177852B2 (en) Hip joint prosthesis
US7799083B2 (en) Prosthesis for restoring motion in an appendage or spinal joint and an intervertebral spacer
US4738681A (en) Femoral-joint prosthetic device
US4986834A (en) Load sharing femoral hip implant
GB1580691A (en) Endoprosthesis for an artificial joint of the human body
EP0179626B1 (en) Improvements relating to bone implants
EP0297789A1 (en) Method of making a prosthetic component and component made according to the method
US5222985A (en) Implantation of articulating joint prosthesis
US4895573A (en) Femoral-joint prosthetic device
GB2319962A (en) Artificial Hip Joint Comprising Femoral Stem and Insert
US4919665A (en) Implantation of articulating joint prosthesis
GB2411839A (en) Prosthesis
US5645600A (en) High performance stem for arthroplasty
JPS58190438A (en) Implantation of joint connecting prosthesis
GB2191402A (en) Improvements relating to hip implants

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)