US5147403A
Expired / Lapsed
US
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Prosthesis implantation method
Assignee: Wright Medical Technology Inc
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Filing: 1989-03-15
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Granted: 1992-09-15
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Expires: 2009-03-15
Abstract
Abstract A technique for implanting a prosthesis is provided. According to the technique a prosthesis is implanted in a host bone by preparing the surface of the host bone to receive the prosthesis, applying calcium sulfate in free-flowing form to the receiving surface of the host bone, and seating the prosthesis in the receiving surface, whereby the calcium sulfate fills one or more gaps resulting between the prosthesis and the host bone.
Inventors
- 👤 Steven Gitelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:40
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/02; A61L27/025; A61F; A61F2/00; A61F2/02; A61F2/28; A61L27/50; A61L27/54; A61L2300/00; A61L2300/40; A61L2300/404; A61L2300/406; Y; Y10; Y10S; Y10S623/00; Y10S623/902; Y10S623/908
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A method of implanting a prosthesis in a host bone comprising the steps of: preparing the surface of the host bone to receive the respective engaging surface of the prosthesis, thereby defining mating surfaces; mixing a material consisting essentially of calcium sulfate hemihydrate with water to produce a free-flowing suspension; applying the calcium sulfate suspension in free-flowing form to the receiving surface of the host bone; and seating the prosthesis in the host bone such that the mating surfaces of the prosthesis and the host bone engage, whereby one or more cavities which result between the mating surfaces of the prosthesis and a host bone are filled with the calcium sulfate.
Claim 2
Independent Claim
111 words
A method of implanting a prosthesis in a host bone comprising the steps of: preparing the surface of the host bone to receive the respective engaging surface of the prosthesis, thereby defining mating surfaces; mixing a material consisting essentially of calcium sulfate hemihydrate with water to produce a free-flowing suspension; applying the calcium sulfate suspension in free-flowing form to the receiving surface of the host bone; and seating the prosthesis in the host bone such that the mating surfaces of the prosthesis and the host bone engage, whereby one or more cavities which result between the mating surfaces of the prosthesis and a host bone are filled with the calcium sulfate.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the water further includes dissolved sodium chloride.
Claim 4
Dependent Claim
21 words
The method of claim 2 wherein the sodium chloride is present in an amount to produce a 0.9 N saline solution.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the calcium sulfate hardens in a time period of from about 5 to about 10 minutes.
Claim 6
Dependent Claim
26 words
The method of claim 1 further comprising the step of: mixing at least one antibiotic with the calcium sulfate to provide an antibiotic-loaded calcium sulfate interface.
Claim 7
Dependent Claim
43 words
The method of claim 5 wherein the step of mixing at least one antibiotic with the calcium sulfate comprises: mixing at least one antibiotic with the calcium sulfate in powdered form to provide an antibiotic-loaded mixture; and mixing the antibiotic-loaded mixture with water.
Claim 8
Dependent Claim
39 words
The method of claim 5 wherein the step of mixing at least one antibiotic with the calcium sulfate comprises: dissolving at least one antibiotic in water; and mixing the calcium sulfate hemihydrate with the water having the dissolved antibiotic.
Claim 9
Dependent Claim
12 words
The method of claim 1 wherein the prosthesis is a hip prosthesis.
Claim 10
Dependent Claim
12 words
The method of claim 1 wherein the prosthesis is a knee prosthesis.
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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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |