US4222128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite implant materials and process for preparing same
Assignee: Kureha Corp
•
Filing: 1978-05-08
•
Granted: 1980-09-16
•
Expires: 1998-05-08
Abstract
Abstract Disclosed is a composite implant material comprising a sintered apatite material and a thermoplastic or thermosetting resin. Said composite material is prepared by forming a sintered apatite material and filling or impregnating a thermoplastic or thermosetting resin into the pores or holes of the sintered apatite material, which have been formed during the formation of said sintered material or perforated after the formation thereof. Said composite implant material has controlled compatibility to bone as well as excellent physical strength.
Inventors
- 👤 Atsushi Tomonaga
- 👤 Hideki Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0012; A61C8/0016; A61F; A61F2/00; A61F2/02; A61F2/28; A61L; A61L27/00; A61L27/02; A61L27/12; A61L27/40; A61L27/44; A61L27/46; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30065; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2/3094; A61F2002/30968; A61F2210/00; A61F2210/0071; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00293
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A composite implant material usable as a prosthesis for a bone or tooth, comprising a perforated sintered apatite material having perforation holes formed therein in a desired configuration and a thermoplastic or thermosetting resin, at least said perforated sintered apatite material existing in a continuous phase, said resin being filled or impregnated into said holes, and the respective phases of said sintered apatite material and said resin being exposed, in part, to the surface of said implant material.
Claim 2
Dependent Claim
78 words
A composite implant material usable as a prosthesis for a bone or tooth, comprising a perforated sintered apatite material having perforation holes formed therein in a desired configuration and a thermoplastic or thermosetting resin, at least said perforated sintered apatite material existing in a continuous phase, said resin being filled or impregnated into said holes, and the respective phases of said sintered apatite material and said resin being exposed, in part, to the surface of said implant material.
Claim 3
Dependent Claim
15 words
A composite implant material according to claim 1, wherein said sintered apatite material comprises hydroxyapatite.
Claim 4
Dependent Claim
44 words
A composite implant material according to claim 1, wherein said thermoplastic or thermosetting resin is selected from the group consisting of polyethylene, polypropylene, polymethyl methacrylate, polyurethane, polyester, acrylonitrile-butadiene-styrene resins, fluorocarbons, polyamides, polyacetals, polycarbonate, polysulfone, epoxy resins, silicone resins, diallyl phthalate resins and furan resins.
Claim 5
Dependent Claim
29 words
A composite implant material according to claim 3, wherein said resin contains a reinforcing material selected from carbon, silicon carbide, glass, alumina, magnesia, zirconia, tungsten, molybdenum and stainless steel.
Claim 6
Dependent Claim
43 words
A process for preparing a composite implant material according to claim 1, comprising forming a sintered apatite material, perforating the sintered apatite material to form holes in a desired configuration therein, and filling or impregnating a thermoplastic or thermosetting resin into said holes.
Claim 7
Dependent Claim
15 words
A process according to claim 5, wherein said sintered apatite material is formed using hydroxyapatite.
Claim 8
Dependent Claim
42 words
A process according to claim 5, wherein said thermoplastic or thermosetting resin is selected from the group consisting of polyethylene, polypropylene, polymethyl methacrylate, polyurethane, polyester, acrylonitrile-butadiene-styrene resins, fluorocarbons, polyamides, polyacetals, polycarbonate, polysulfone, epoxy resins, silicone resins, diallyl phthalate resins and furan resins.
Claim 9
Dependent Claim
31 words
A process according to claim 5, wherein said sintered apatite material is perforated by mechanical perforation or chemical treatment, or by perforation by means of ultrasonic wave, laser or water jet.
References Cited (Backward Citations)
US3628248A
Cited
US3713860A
Cited
US4131597A
Cited
US4073999A
Cited
US4097935A
Cited
US4171544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |