US4863472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone graft implant
Assignee: Biocon Oy
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Filing: 1987-09-02
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Granted: 1989-09-05
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Expires: 2007-09-02
Abstract
Abstract PCT No. PCT/FI87/00119 Sec. 371 Date Jul. 5, 1988 Sec. 102(e) Date Jul. 5, 1988 PCT Filed Sep. 2, 1987 PCT Pub. No. WO88/01517 PCT Pub. Date Mar. 10, 1988.Supporting structure (1) for preventing the movements of powder material (2) which will be applied as bone graft (bone graft powder) which supporting structue (1) will be located to contact with bone tissue and which supporting structure (1) is manufactured of at least partially resorbable polymer, copolymer or polymer mixture and is of its form chutelike, box-like, a flat tube or bag and contains such open porosity, which allows the surrounding tissues to grow through the supporting structure (1) but which prevents the migration of the bone graft powder (2) through the pores outside the supporting structure (1). The part of the supporting (1) which will be located against bone surface contains at least one orifice, whose size is bigger than the size of pores of the supporting (1) and bigger than the size of the bone graft powder (2) particles, which orifice makes possible the growth of the bone tissue into the inside of the supporting structure (1).
Inventors
- 👤 Pertti Tormala
- 👤 Pentti Rokkanen
- 👤 Valle J. Oikarinen
- 👤 Seppo Vainionpaa
- 👤 Pertti Helevirta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
A; A61; A61L; A61L31/00; A61C; A61C8/00; A61C8/0012; A61F; A61F2/00; A61F2/02; A61F2/28; A61L27/00; A61L27/40; A61L27/44; A61L27/46; A61F2002/2835; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2210/00; A61F2210/0004; A61L2430/00; A61L2430/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A supporting structure for preventing movement of powder material which is applied as bone graft which supporting structure will be located to contact bone tissue, wherein said structure contains bone grafts powder, said supporting structure comprising an at least partially resorbable polymer, copolymer or polymer mixture and having an open porosity for allowing surrounding connective tissues to grow through the supporting structure, but which prevents the migration of the bone graft powder through the pores wherein the part of the supporting structure which will be located against bone surface contains at least one orifice, whose size is bigger than the size of pores of the supporting structure, and bigger than the size of the bone graft powder particles, said orifice making possible the growth of the bone tissue into the inside of the supporting structure.
Claim 2
Dependent Claim
135 words
A supporting structure for preventing movement of powder material which is applied as bone graft which supporting structure will be located to contact bone tissue, wherein said structure contains bone grafts powder, said supporting structure comprising an at least partially resorbable polymer, copolymer or polymer mixture and having an open porosity for allowing surrounding connective tissues to grow through the supporting structure, but which prevents the migration of the bone graft powder through the pores wherein the part of the supporting structure which will be located against bone surface contains at least one orifice, whose size is bigger than the size of pores of the supporting structure, and bigger than the size of the bone graft powder particles, said orifice making possible the growth of the bone tissue into the inside of the supporting structure.
Claim 3
Dependent Claim
92 words
A supporting structure according to claim 1 wherein the bone graft powder comprises at least one of the materials consisting of: apatites, fluoroapatites, tricalcium phosphates, dicalcium-phosphates, aluminum oxide ceramics, bioglasses or glass ceramics containing apatite, and the resorbable supporting structure or binder polymer phase comprises at least one of the resorbable polymers consisting of: polyglycolides (PGA), polylactides (PLA), glycolide/lactide copolymers (PGA/PLA), glycolide/trimethylene carbonate copolymers (PGA/TMC), poly-β-hydroxybutyric acid (PHBA), poly-β-hydroxypropionic acid (PHPA), poly-β-hydroxyvaleric acid (PHVA), PHBA/PHVA copolymers, poly-p-dioxanone (PDS), poly-1,4-dioxanon-2,5-dione, polyesteramides (PEA), poly-ε-caprolactones, poly-δ-valerolactone, poly-carbonate, polyesters of oxalic acid, glycolic esters, and dihydropyranes.
Claim 4
Dependent Claim
17 words
A supporting structure according to claim 1, wherein the supporting structure is constructed of resorbable woven fibers.
Claim 5
Dependent Claim
19 words
A supporting structure according to claim 1, wherein the supporting structure has at least one end which is open.
Claim 6
Dependent Claim
48 words
A supporting structure according to claim 1, wherein the supporting structure has ends which have been closed by end plates, said end plates comprising a resorbable polymer, copolymer or polymer mixture and the end plates are of the same material as the other parts of the supporting structure.
Claim 7
Dependent Claim
16 words
A supporting structure according to claim 1, wherein said structure comprises a plurality of honeycomb-like compartments.
Claim 8
Dependent Claim
32 words
A supporting structure according to claim 1, wherein the orifice(s) of the supporting structure is (are) covered by a thin film or plate, comprising a rapidly resorbable polymer, copolymer or polymer mixture.
Claim 9
Dependent Claim
21 words
A supporting structure according to claim 1, wherein said structure contains ceramic bone graft powder dispersed in a resorbable polymer matrix.
Claim 10
Dependent Claim
21 words
A supporting structure according to claim 1 wherein said bone graft powder is admixed with a resorbable polymer as a binder.
Claim 11
Dependent Claim
16 words
A supporting structure according to claim 1 wherein said structure is constructed of resorbable knit fibers.
Claim 12
Dependent Claim
19 words
A supporting structure according to claim 1 wherein said structure is constructed of fibers which have been melted together.
References Cited (Backward Citations)
US4657548A
Cited
US4755184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |