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US4064567A
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Prosthesis-to-bone interface system
Assignee: SAMPSON CORP
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Filing: 1976-09-15
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Granted: 1977-12-27
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Expires: 1996-09-15
Abstract
Abstract A woven basket is placed over the stem of a prosthesis and receives bone cement therewithin and through its intersticies. The resulting prosthesis-to-bone interface greatly improves the distribution of forces transferred to the bone.
Inventors
- 👤 Albert H. Burstein
- 👤 Bertram L. Koslin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:09
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/04; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61L27/00; A61L27/14; A61L27/18; A61L31/02; A61L31/022; A61L31/024; A61F2/32; A61F2/36; A61F2/3662; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30138; A61F2002/30153; A61F2002/30158; A61F2002/30316; A61F2002/30329; A61F2002/30451; A61F2002/30535; A61F2002/30565; A61F2002/30571; A61F2002/30909; A61F2002/30914; A61F2/3609; A61F2002/3611; A61F2002/3625; A61F2002/3631; A61F2/46; A61F2002/4631; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0017; A61F2230/0019; A61F2230/0026; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00389; A61F2310/00395; A61F2310/00401; A61F2310/00407; A61F2310/00413
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
57 words
A prosthesis-to-bone interface comprising a sheath formed of a single thickness of a relatively rigid, malleable and intersticiated material, generally conforming in shape and adapted to receive the stem of a prosthesis therein, and means for spacing the inner wall of said sheath from said stem to define a space within which bone cement may be received.
Claim 2
Dependent Claim
57 words
A prosthesis-to-bone interface comprising a sheath formed of a single thickness of a relatively rigid, malleable and intersticiated material, generally conforming in shape and adapted to receive the stem of a prosthesis therein, and means for spacing the inner wall of said sheath from said stem to define a space within which bone cement may be received.
Claim 3
Dependent Claim
26 words
An interface as defined in claim 1 and further including means for spacing the outer wall of said sheath from the cortical shell of the bone.
Claim 4
Dependent Claim
33 words
An interface as defined in claim 1 wherein said sheath is deformed inwardly at spaced points along its length forming dimples which define said means spacing the inner wall from said prosthesis stem.
Claim 5
Dependent Claim
32 words
An interface as defined in claim 2 wherein said sheath is deformed outwardly as spaced points along its length forming dimples which define said means spacing the outer wall from cortical bone.
Claim 6
Dependent Claim
26 words
An interface as defined in claim 1 and further including a widened collar at the proximal end of said sheath and formed of the same material.
Claim 7
Dependent Claim
29 words
An interface as defined in claim 1 wherein the intersticiated material is a perforated sheet formed of a metal or other high modulus ductile material compatible with the body.
Claim 8
Dependent Claim
29 words
An interface as defined in claim 1 wherein the intersticiated material is a mesh formed of a metal or other high modulus ductile wire material compatible with the body.
Claim 9
Dependent Claim
14 words
An interface as defined in claim 7 wherein said mesh wire is chrome-cobalt alloy.
Claim 10
Dependent Claim
29 words
An interface as defined in claim 7 wherein some of the mesh wires run longitudinally along the sheath axis and the remaining wires run at substantially right angles thereto.
Claim 11
Dependent Claim
40 words
An interface as defined in claim 1 and further including leaf spring means on the outer face of said sheath adjacent to the distal end thereof engageable with the medullary canal to properly space the prosthesis stem with respect thereto.
Claim 12
Dependent Claim
20 words
An interface as defined in claim 1 wherein said sheath is tubular, tapering from its proximal to its distal end.
Claim 13
Dependent Claim
101 words
An interface for strengthening the connection between a prosthetic device and human or animal bone wherein the device is adapted for insertion in a bone cavity which has been prepared to receive the same and which includes the application of a bone cement, comprising a sheath formed of a single thickness of a relatively rigid, malleable and intersticiated material, means for spacing the inner wall of said sheath from said stem to define a cement receiving space therebetween, the stem of the prosthetic device and cement substantially filling and surrounding said sheath, with cement extending through the intersticies of the sheath.
Claim 14
Dependent Claim
101 words
An interface for strengthening the connection between a prosthetic device and human or animal bone wherein the device is adapted for insertion in a bone cavity which has been prepared to receive the same and which includes the application of a bone cement, comprising a sheath formed of a single thickness of a relatively rigid, malleable and intersticiated material, means for spacing the inner wall of said sheath from said stem to define a cement receiving space therebetween, the stem of the prosthetic device and cement substantially filling and surrounding said sheath, with cement extending through the intersticies of the sheath.
Claim 15
Dependent Claim
31 words
An interface as defined in claim 12 wherein said sheath is formed of a mesh or perforated sheet of a metal or other high modulus ductile material compatible with the body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |