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US5514181A
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US
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Absorbable structures for ligament and tendon repair
Assignee: Ethicon Inc
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Filing: 1994-09-29
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Granted: 1996-05-07
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Expires: 2014-09-29
Abstract
Abstract A fully absorbable prosthesis (1) for the repair of damaged ligaments and/or tendons in the form of a multilayer spiral roll comprising the following spiral layers: a foraminous layer (2) of a synthetic bioabsorbable material; a bioabsorbable film (3); and a layer (4) of a bioabsorbable biopolymer sponge. The invention also provides a method of making such a prosthesis, comprising the steps of: providing a laminate of a foraminous layer of bioabsorbable material and a bioabsorbable film; coating the laminate with a layer of an aqueous gel comprising a bioabsorbable polymer; rolling up the laminate and the gel layer into a spiral roll, followed by drying the gel to form a layer of bioabsorbable sponge. The foraminous layer (2) preferably comprises a synthetic bioabsorbable polymer having high tensile strength. The bioabsorbable film (3) and sponge layer (4) preferably comprise a chemotactic biopolymer such as collagen.
Inventors
- 👤 Nicholas D. Light
- 👤 James MacGregor
- 👤 Wilson Harvey
- 👤 Paul W. Watt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; A61B; A61B17/00; A61B17/11; A61B17/1146; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/48; A61L27/50; A61L27/58; A61B2017/00004; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30064; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30291; A61F2002/30293; A61F2/3094; A61F2002/30971; A61F2210/00; A61F2210/0004; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2230/0091; A61F2240/00; A61F2240/001; A61L2430/00; A61L2430/10; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
97 words
An axially elongated bioabsorbable ligament or tendon prosthesis in the form of a multilayered spiral roll comprising: a laminate comprising: a foraminous layer of a synthetic bioabsorbable material; a layer of bioabsorbable film; a layer of a bioabsorbable sponge; and wherein the laminate is spirally wound about itself such that multiple layers of the laminate overlap radially and form the axially elongated prosthesis and whereby the foraminous layer provides strength to the prosthesis, the layer of bioabsorbable sponge promotes cellular ingrowth into the prosthesis and the layer of bioabsorbable film radially limits cellular ingrowth into the prosthesis.
Claim 2
Dependent Claim
97 words
An axially elongated bioabsorbable ligament or tendon prosthesis in the form of a multilayered spiral roll comprising: a laminate comprising: a foraminous layer of a synthetic bioabsorbable material; a layer of bioabsorbable film; a layer of a bioabsorbable sponge; and wherein the laminate is spirally wound about itself such that multiple layers of the laminate overlap radially and form the axially elongated prosthesis and whereby the foraminous layer provides strength to the prosthesis, the layer of bioabsorbable sponge promotes cellular ingrowth into the prosthesis and the layer of bioabsorbable film radially limits cellular ingrowth into the prosthesis.
Claim 3
Dependent Claim
21 words
A bioabsorbable prosthesis according to claim 1, wherein the diameter of the multilayered spiral roll is from 1.2 to 21 mm.
Claim 4
Dependent Claim
45 words
A bioabsorbable prosthesis according to claim 1, wherein the foraminous layer comprises a polymer or copolymer of lactic acid and/or glycolic acid, oxidised regenerated cellulose, polydioxanone (PDS), a copolymer of lactic acid and ε-caprolactam, polyhydroxybutyric acid or a copolymer of hydroxybutyric acid and hydroxyvaleric acid.
Claim 5
Dependent Claim
22 words
A bioabsorbable prosthesis according to claim 1, wherein the foraminous layer is embedded in the bioabsorbable film or in the sponge layer.
Claim 6
Dependent Claim
23 words
A bioabsorbable prosthesis according to claim 1 wherein the maximum thickness of the foraminous layer is in the range 0.02 to 0.3 mm.
Claim 7
Dependent Claim
20 words
A bioabsorbable prosthesis according to claim 1, wherein the bioabsorbable film comprises a biopolymer or a chemically cross-linked biopolymer derivative.
Claim 8
Dependent Claim
15 words
A bioabsorbable prosthesis according to claim 6, wherein the biopolymer comprises collagen or a glycosaminoglycan.
Claim 9
Dependent Claim
16 words
A bioabsorbable prosthesis according to claim 1, wherein oil microdroplets are dispersed in the bioabsorbable film.
Claim 10
Dependent Claim
30 words
A bioabsorbable prosthesis according to claim 8, wherein the oil is present in an amount of from 1% to 90% by weight, based on the weight of the bioabsorbable film.
Claim 11
Dependent Claim
22 words
A bioabsorbable prosthesis according to claim 1, wherein the thickness of the bioabsorbable film is in the range 0.01 to 0.1 mm.
Claim 12
Dependent Claim
20 words
A bioabsorbable prosthesis according to claim 1, wherein the bioabsorbable sponge comprises a biopolymer or a chemically cross-linked biopolymer derivative.
Claim 13
Dependent Claim
16 words
A bioabsorbable prosthesis according to claim 11, wherein the bioabsorbable sponge comprises collagen or a glycosaminoglycan.
Claim 14
Dependent Claim
19 words
A bioabsorbable prosthesis according to claim 1, further comprising microdroplets of a bioabsorbable oil dispersed in the bioabsorbable sponge.
Claim 15
Dependent Claim
32 words
A bioabsorbable prosthesis according to claim 13, wherein the bioabsorbable oil which is present in the amount of from 1% to 90% by weight, based on the weight of the bioabsorbable sponge.
Claim 16
Dependent Claim
23 words
A bioabsorbable prosthesis according to claim 1, wherein the thickness of the bioabsorbable sponge layer is in the range 0.5 to 2.5 mm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-05-07 | 1999-11-06 | 2000-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-07 | 2003-11-06 | 2004-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-07 | 2007-11-06 | 2008-05-07 | $7700.00 | Window Closed / Lapsed |