US4743257A
Expired / Lapsed
US
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Material for osteosynthesis devices
Assignee: Materials Consultants Oy
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Filing: 1986-05-08
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Granted: 1988-05-10
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Expires: 2006-05-08
Abstract
Abstract Surgical osteosynthesis composite material, which is self-reinforced i.e. it is formed about the absorbable polymer or copolymer matrix which is reinforced with the absorbable reinforcement units which have the same chemical element percentage composition as the matrix has.
Inventors
- 👤 Pertti Tormala
- 👤 Pentti Rokkanen
- 👤 Juha Laiho
- 👤 Markku Tamminmaki
- 👤 Seppo Vainionpaa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:55
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/148; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/3094; A61F2/30965; A61L31/12; A61L31/125; A61L31/129; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/80; A61B17/84; A61B17/86; A61B2017/00004; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2210/00; A61F2210/0004; A61F2230/00; A61F2230/0063; A61F2230/0069
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
46 words
Surgical, osteosynthesis composite material which is at least partially absorbable in living tissue characterized in that the osteosynthesis material comprises an absorbable polymer or copolymer matrix which is reinforced with absorbable polymeric reinforcement elements which have the same chemical element percentage composition as does the matrix.
Claim 2
Dependent Claim
46 words
Surgical, osteosynthesis composite material which is at least partially absorbable in living tissue characterized in that the osteosynthesis material comprises an absorbable polymer or copolymer matrix which is reinforced with absorbable polymeric reinforcement elements which have the same chemical element percentage composition as does the matrix.
Claim 3
Dependent Claim
30 words
Osteosynthesis composite material as claimed in claim 1, characterized in that the reinforcement elements are in the form of fibers, threads, twists, cords, films, ribbons, woven fabrics or corresponding material.
Claim 4
Dependent Claim
25 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the absorbable matrix and reinforcement units are manufactured of polyglycolide or a glycolide copolymer.
Claim 5
Dependent Claim
25 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the absorbable matrix and reinforcement units are manufactured of polylactide or a lactide copolymer.
Claim 6
Dependent Claim
22 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the absorbable matrix and reinforcement units are manufactured of glycolide/lactide copolymer.
Claim 7
Dependent Claim
22 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the absorbable matrix and reinforcement units are manufactured of poly-β-hydroxybutyric acid.
Claim 8
Dependent Claim
21 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the absorbable matrix and reinforcement units are manufactured of polydioxanone.
Claim 9
Dependent Claim
21 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the absorbable matrix and reinforcement units are manufactured of polyvinylalcohol.
Claim 10
Dependent Claim
21 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the absorbable matrix and reinforcement units are manufactured of polyesteramide.
Claim 11
Dependent Claim
32 words
Osteosynthesis composite material as claimed in claim 1 characterized in that the material forms in the shape of a three-dimensional solid, an osteosynthesis implant, or at least part of an osteosynthesis implant.
Claim 12
Dependent Claim
24 words
The osteosynthesis composite material of claim 10 wherein said implant is in the form of a plate, pin, nail, medullary rod, screw, or balk.
Claim 13
Independent Claim
57 words
A method for manufacturing material for the osteosynthesis devices of any of claims 1-10 which comprises mixing together a melt of the absorbable polymer or copolymer said melt formed by heat and/or pressure, and the absorbable reinforcement elements to provide a mixture and forming the mixture into the desired shape and permitting the shape to cool down.
Claim 14
Dependent Claim
23 words
The method of claim 12 wherein said reinforcement element is in the form of fiber, thread, twist, cord, film, ribbon, or woven fabric.
Claim 15
Dependent Claim
56 words
The method of claim 12 wherein the part of the material which will form the matrix is subjected to heat and/or pressure in such a way that the physical condition of the part of the material which will act as the matrix phase allows the development of adhesion between the nearly reinforcement elements and the matrix.
Claim 16
Dependent Claim
41 words
The method of claim 14 wherein the absorbable reinforcement element is heated in such a way that the material is softened or melted and coalesced at least partially and the material is formed into the desired shape by means of pressure.
Claim 17
Dependent Claim
41 words
The method of claim 12 wherein the absorbable reinforcement element is heated in such a way that the material is softened or melted and coalesced at least partially and the material is formed into the desired shape by means of pressure.
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |