EP0274898A2
Expired / Lapsed
EP
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Implant
Assignee: Ethicon Inc
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Filing: 1987-12-23
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Granted: —
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Expires: 2007-12-23
Abstract
Abstract The invention relates to an implant from an open-cell, foam-like plastic material based on resorbable polyesters, such as poly-p-dioxanone, other polyhydroxycarboxylic acids, polylactides or polyglycolides, as well as their copolymers, in which one or more textile reinforcing elements made from resorbable plastic are embedded in an open-cell plastic matrix with a pore size of 10 to 200 µm.
Inventors
- 👤 Bernhard Dr. Hinsch
- 👤 Christoph Dr. Walther
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 20:59
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/56; A61L27/40; A61L27/44; A61L27/48
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
58 words
Implant of an open-cell, foam-like plastic material based on resorbable polyesters such as poly-p-dioxanone, other polyhydroxy carboxylic acids, polylactides or polyglycolides, as well as their copolymers, characterized in that one or more reinforcing elements of a textile nature formed from resorbable plastic are embedded in an open-cell plastic matrix with a pore size of 10 to 200 µm.
Claim 2
Dependent Claim
58 words
Implant of an open-cell, foam-like plastic material based on resorbable polyesters such as poly-p-dioxanone, other polyhydroxy carboxylic acids, polylactides or polyglycolides, as well as their copolymers, characterized in that one or more reinforcing elements of a textile nature formed from resorbable plastic are embedded in an open-cell plastic matrix with a pore size of 10 to 200 µm.
Claim 3
Dependent Claim
31 words
Implant according to claim 1, characterized in that compared with the resorbable plastic of the matrix, the resorbable plastics of the textile reinforcing elements have the same or a slower resorbability.
Claim 4
Dependent Claim
30 words
Implant according to claim 1, characterized in that the textile reinforcing elements are knitted, woven, twisted, braided or as felts in the form of fibres, threads, hoses, strips or fleeces.
Claim 5
Dependent Claim
23 words
Implant according to claims 1 to 4, characterized in that the open-cell plastic matrix has a pore size of 20 to 150 µm.
Claim 6
Dependent Claim
21 words
Implant according to claims 1 to 3, characterized in that the density of the plastic matrix is 0.05 to 0.60 g/cm³.
Claim 7
Dependent Claim
61 words
Process for the production of an implant according to claims 1 to 5, characterized in that poly-p-dioxanone, polylactides or polyglycolides are dissolved in a solvent in a concentration of 5 to 30 parts by weight of polymer and the textile reinforcing element is frozen in a mould together with the plastic solution and then the solvent is removed by freeze drying.
Claim 8
Dependent Claim
36 words
Process according to claim 6, characterized in that the solvent used is hexafluoroisopropanol, 1,4-dioxan or a mixture of 1,4-dioxan and an acetate of a C₂ to C₅ alcohol in a volume ratio of 99:1 to 50:50.
Claim 9
Dependent Claim
43 words
Process according to claims 6 and 7, characterized in that use is made of poly-p-dioxanone with an inherent viscosity of 0.5 to 3.0 or polylactides with an inherent viscosity of 0.5 to 2.2 or polyglycolides with an inherent viscosity of 0.5 to 4.0.
Claim 10
Dependent Claim
29 words
Modification of the process according to claims 6 to 8, characterized in that the textile reinforcing element is impregnated with the plastic solution and then frozen and freeze dried.
Claim 11
Dependent Claim
42 words
Modification of the process according to claims 6 to 8, characterized in that crystalline organic compounds, salts of organic acids or inorganic salts are added to the solvents and after freeze drying are extracted from the implant with a suitable inert solvent.
References Cited (Backward Citations)
No citation records indexed.
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