EP0169045A2
Expired / Lapsed
EP
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Connective tissue prosthesis
Assignee: Johnson and Johnson
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Filing: 1985-07-15
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Granted: —
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Expires: 2005-07-15
Abstract
Abstract A prosthesis, such as a ligament or tendon prosthesis, comprises a low elastic modulus load bearing element (1) to which are attached a plurality of fine filaments (3) having a higher elastic modulus. The arrangement is such that the fine filaments are unstressed unless the load on the prosthesis exceeds a predetermined value, thus simultating the mechanical response of native collagenous tissue. The fine filaments, which are preferably of polyester, are arranged to allow ingrowth of fresh connective tissue.
Inventors
- 👤 Jitendera Shamtilal Shah
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2250/00; A61F2250/0014; A61F2250/0018
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
95 words
A biocompatible connective tissue prosthessis, comprising a first lead bearing element, and a bandle of fine filaments which are arranged to allow ingrowth of connective tissue. said filaments having a collective elastic modulus which is greater than the effective elastic modulus of the first element, and being attached to the first element at spaced points along their length. the length of filament between said points being greater than the unstressed length of the first element between said points, such that the filaments are substantially unstressed unless the load on the prosthesis exceeds a predetermined value.
Claim 2
Dependent Claim
95 words
A biocompatible connective tissue prosthessis, comprising a first lead bearing element, and a bandle of fine filaments which are arranged to allow ingrowth of connective tissue. said filaments having a collective elastic modulus which is greater than the effective elastic modulus of the first element, and being attached to the first element at spaced points along their length. the length of filament between said points being greater than the unstressed length of the first element between said points, such that the filaments are substantially unstressed unless the load on the prosthesis exceeds a predetermined value.
Claim 3
Dependent Claim
25 words
A prosthesis according to Claim 1 wherein the first load bearing element has an elastic modulus of from 0.1 to 2 MPa. or Claim 2
Claim 4
Dependent Claim
22 words
A prosthesis according to Claim 1/wherein the fine filaments have a collective elastic modulus of from 100 to 3.000 MPa. any precedirg
Claim 5
Dependent Claim
26 words
A prosthesis according to any preceding Claim wherein the elastic strain limit of the first element is substantially greater than that of the filaments, any preceding
Claim 6
Dependent Claim
24 words
A prosthesis according to any preceding Claim wherein the linear elastic strain limit of the fine filaments is from 2% to 3%. any preceding
Claim 7
Dependent Claim
33 words
A prosthesis according to any preceding Claim wherein the maximum degree to which the first element can be stretched without stressing the fine filaments is in the range 1% to 15%. any preceding
Claim 8
Dependent Claim
22 words
A prosthesis according to/Claim wherein the first element comprises a single core surrounded by the fine filaments. any of 1 to 6
Claim 9
Dependent Claim
28 words
A prosthesis according to any of Claim 1 to 6 wherein the first element is in the form of a spring having the required elastic modulus. 1 6
Claim 10
Dependent Claim
21 words
A prosthesis according to any of Claias 1 to 6 wherein the first element comprises one or more substantially straight filaments.
Claim 11
Dependent Claim
21 words
A prosthesis according to any of Claias 1 to 6 wherein the first element comprises one or more substantially straight filaments.
Claim 12
Dependent Claim
17 words
A prosthesis according to Claim 9 wherein the first element is a medical grade silicone rubber filament.
Claim 13
Dependent Claim
28 words
A prosthesis according to any proceding claim wherein the fine filaments are of a polyester or polyamide, and have a diameter in the range 8 to 20 microns.
Claim 14
Dependent Claim
26 words
A prosthesis according to Claim 11 comprising from 50 to 1500 filamentary yarns, each consisting of from 20 to 100 fine filamnts. any precedirg any preceding
Claim 15
Dependent Claim
22 words
A prosthesis according to Claim wherein one or both ends of the fine filamnts are threaded through a surgical needle. any precedirg
Claim 16
Dependent Claim
16 words
A prosthesis according to/Claim wherein the fine filaments are wound or woven around the first element.
Claim 17
Dependent Claim
19 words
A prosthesis according to any preceding Claim wherein the fine filaments are coated with an agent promoting cell adhesion.
Claim 18
Independent Claim
55 words
A method of making a prosthesis comprises stretching a first load bearing element by a predetermined amount and then fixing a bundle of fine filaments at two or more spaced points along the length of the first element, such that the fine filaments are unstressed unless the first element is stretched by said predetermined amount.
Claim 19
Independent Claim
55 words
A method of making a prosthesis comprises stretching a first load bearing element by a predetermined amount and then fixing a bundle of fine filaments at two or more spaced points along the length of the first element, such that the fine filaments are unstressed unless the first element is stretched by said predetermined amount.
References Cited (Backward Citations)
No citation records indexed.
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