GB2059777A - Endoprosthetic bone joint components - Google Patents
Endoprosthetic bone joint components Download PDFInfo
- Publication number
- GB2059777A GB2059777A GB8030996A GB8030996A GB2059777A GB 2059777 A GB2059777 A GB 2059777A GB 8030996 A GB8030996 A GB 8030996A GB 8030996 A GB8030996 A GB 8030996A GB 2059777 A GB2059777 A GB 2059777A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component according
- supplemented
- sheathing
- carbon
- secured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 14
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 230000003872 anastomosis Effects 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims abstract description 3
- 239000002639 bone cement Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000011164 ossification Effects 0.000 description 1
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
- 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
- A61L27/02—Inorganic materials
- A61L27/08—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
- 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
- A61F2/30721—Accessories
- A61F2/30723—Plugs or restrictors for sealing a cement-receiving space
-
- 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
-
- 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
- A61F2/30907—Nets or sleeves applied to surface of prostheses or in cement
- A61F2002/30919—Sleeves
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Chemical & Material Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Inorganic Chemistry (AREA)
- Dermatology (AREA)
- Medicinal Chemistry (AREA)
- Epidemiology (AREA)
- Prostheses (AREA)
Abstract
An endoprosthetic bone joint component having an elongate member for entry into and securement to bone, the member being made primarily of metal and then supplemented by a carbon-fibre-reinforced carbon material secured thereto and defining at least part of the outer surface of the member to promote anastomosis in use of the device. The member can be supplemented by material in the form of one or more plugs extending transversely therethrough, preferably extending slightly proud of the member, and/or by at least partial sheathing. When sheathing is employed the member suitably has a ribbed, grooved, or other geometrically discontinuous cross-sectional shaping, and the sheathing preferably includes a tubular braid of carbon fibre. The material can be secured to the member by application of binder which is then pyrolysed.
Description
SPECIFICATION
Endoprosthetic bone joint components
This invention concerns endoprosthetic bone joint components and more particularly such components having stems or like elongated members for entry into and securement with bone.
Such stemmed components, or at least the elongate members thereof, are usually made of metal for reasons of strength, with the members being secured in the relevant bones in association with a gapfilling medium of acrylic form generally referred to as "bone cement". However, notwithstanding the fact that such components and fixation can provide useful results and are in widespread routine clinical usage, some doubts exist regarding the use of bone cement in the longer term. These doubts are perhaps better expressed as a wish to employ a mode of securement which is more physiologically natural, and an object of the present invention is to realise this wish while retaining desirable benefits of the existing metal fabrication.
Accordingly, the present invention provides an endoprosthetic bone joint component comprising an elongate member for entry into and securement to bone, said member being made primarily of metal and then supplemented by a porous carbon-fibrereinforced carbon material (CFRC) secured thereto and defining at least part of the outer surface of said member to promote anastomosis in use of the device.
Anastomosis is the growth of fibrous tissue and can serve to secure the relevant member in bone by intrusion into the CFRC whereafter the tissue ossifies to form a physiological anchor. This phenomenon and the relevance thereto of CFRC is discussed in more detail in the co-pending application filed on even date herewith (Application
Number 30997/80), and such discussion is wholly and equally applicable in the present instance also.
The present invention can be viewed, in one respect, as a forerunner of that in said copending application, in so far as the former is more closely related than the latter to existing, ethically acceptable components and so can be more readily advanced through clinical trials.
In practice it is presently preferred that said metal member is supplemented by CFRC in the form of one or more plugs extending transverselytherethrough.
These plugs are preferably formed and located to be slightly proud of the metal member with the intention of allowing a friction fit in bone. Such a fit will provide a measure of stability for the component during the period of anastomosis and ossification, and the location of the CFRC in closest proximity to the bone will more readily promote anastomosis.
Securement of these proposed plugs can be effected by use of any suitable mechanical technique, such as a screw mechanism, but the present intention is that the plugs be bonded by use of further binder which is then pyrolised. More particularly, it is proposed that each plug be formed in two longitudinal halves with transversely enlarged heads, these halves being located from opposite ends of an appropriately counterbored passageway through the relevant member. in this last case, binder material can be sandwiched between the plug halves and then pyrolised to lock them in place.
In an alternative or modified arrangement the metal member is supplemented by sheathing, partially or wholly, with CFRC. Clearly, such a sheath can be used alone or in association with plugs, and in the latter case the sheath can serve to hold the plugs in place by securement to the member, or the sheath and plugs can be interlocked and so rendered captive on the member. Securement of such a sheath to the member suitably involves the provision of polygonal, ribbed, grooves, or other geometrically discontinuous cross-sectional shaping for the member to inhibit relative movement between the sheath and member after pyrolysis of the former on the latter.
Also, while the sheath can be fabricated with a variety of fibre matrix forms, it is preferred that a carbon fibre braid be employed. A braid will provide a desirable fibre orientation for the purposes of augmenting the strength of the metal member, and is at the same time of a tubular form which will readily conform to the shape of the member.
Yet another possibility for more general application in the present invention is that of carbon vapour deposition (CVD) both to form orto further impregnate the CFRC and at the same time to secure the same to the member. However this may lead to a requirement for subsequent heat treatment of the metal to ensure suitable properties because of the high temperatures involved in CVD. This is not the case for binder pyrolysis which involves lower temperatures.
Claims (7)
1. An endoprosthetic bone joint component comprising an elongate member for entry into and securement to bone, said member being made primarily of metal and then supplemented by a porous carbon-fibre-reinforced carbon material secured thereto and defining at least part of the outer surface of said member to promote anastomosis in use of the device.
2. A component according to claim 1 wherein said member is supplemented by said material in the form of one or more plugs extending transversely therethrough.
3. A component according to claim 2 wherein each said plug is formed and located to extend slightly proud of said member.
4. A component according to claim 1, 2 or 3 wherein said member is supplemented by at least partially sheathing the same with said material.
5. A component according to claim 4 wherein said member has polygonal, ribbed, grooved, or other geometrically discontinuous cross-sectional shaping.
6. A component according to claim 4 or 5 wherein said sheathing includes a tubular braid of carbon fibre.
7. A component according to any preceding claim wherein said material is secured to said member by the application of binder material which is then pyrolised.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8030996A GB2059777B (en) | 1979-09-25 | 1980-09-25 | Endoprosthetic bone joint components |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7933183 | 1979-09-25 | ||
| GB8030996A GB2059777B (en) | 1979-09-25 | 1980-09-25 | Endoprosthetic bone joint components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2059777A true GB2059777A (en) | 1981-04-29 |
| GB2059777B GB2059777B (en) | 1983-06-22 |
Family
ID=26272993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8030996A Expired GB2059777B (en) | 1979-09-25 | 1980-09-25 | Endoprosthetic bone joint components |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2059777B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2490483A1 (en) * | 1980-09-25 | 1982-03-26 | South African Inventions | SURGICAL IMPLANT IN THE FORM OF A NAIL AND A SURGICAL IMPLANT NEEDLE, COMPRISING A FLEXIBLE CORD, A NAIL AND ANCHOR ELEMENT |
-
1980
- 1980-09-25 GB GB8030996A patent/GB2059777B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2490483A1 (en) * | 1980-09-25 | 1982-03-26 | South African Inventions | SURGICAL IMPLANT IN THE FORM OF A NAIL AND A SURGICAL IMPLANT NEEDLE, COMPRISING A FLEXIBLE CORD, A NAIL AND ANCHOR ELEMENT |
| US4590928A (en) * | 1980-09-25 | 1986-05-27 | South African Invention Development Corporation | Surgical implant |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2059777B (en) | 1983-06-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |