Patent US5201738A successfully refreshed from Google Patents.
US5201738A
Expired / Lapsed
US
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Biodegradable biocompatible anti-displacement device for prosthetic bone joints
Assignee: Johnson and Johnson Professional Inc
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Filing: 1990-12-10
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Granted: 1993-04-13
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Expires: 2010-12-10
Abstract
Abstract A biodegradable biocompatible anti-displacement device and method are disclosed for implantation of a prosthetic bone joint (20) in a bone (10). A biodegradable biocompatible anti-displacement device (40) comprising a biodegradable biocompatable polymer is directed through an orifice (26), defined by a cup (22) of a prosthetic bone joint (20), and into interfering contact with bone tissue (14) of the bone. Displacement of the cup is thereby sufficiently limited to allow bone tissue growth at the cup to fix the prosthetic bone joint to the bone while body fluid at the bone tissue and contacting the elongate member biodegrades the elongate member. <IMAGE>
Inventors
- 👤 Richard D. Scott
- 👤 Deger C. Tunc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2/30721; A61F2/30723; A61F2/30767; A61F2/46; A61F2/4603; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30316; A61F2002/30329; A61F2002/30476; A61F2002/30495; A61F2002/30733; A61F2002/3412; A61F2002/3414; A61F2210/00; A61F2210/0004; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/908; Y10S606/91
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
122 words
A device for sufficiently limiting displacement of a cup of an implanted prosthetic bone joint to allow bone tissue growth at the cup to fix said prosthetic bone joint to the bone, comprising: an elongate member, at least a portion of which is formed of a biodegradable biocompatible polymer, said portion of the elongate member extending through said cup and in interfering contact with said cup, and into interfering contact with bone tissue, whereby displacement of the cup of the prosthetic bone joint is sufficiently limited to allow bone tissue growth at the cup to fix said prosthetic bone joint to the bone, and whereby the elongate member is thereafter biodegraded by body fluid at the bone tissue contacting the elongate member.
Claim 2
Independent Claim
122 words
A device for sufficiently limiting displacement of a cup of an implanted prosthetic bone joint to allow bone tissue growth at the cup to fix said prosthetic bone joint to the bone, comprising: an elongate member, at least a portion of which is formed of a biodegradable biocompatible polymer, said portion of the elongate member extending through said cup and in interfering contact with said cup, and into interfering contact with bone tissue, whereby displacement of the cup of the prosthetic bone joint is sufficiently limited to allow bone tissue growth at the cup to fix said prosthetic bone joint to the bone, and whereby the elongate member is thereafter biodegraded by body fluid at the bone tissue contacting the elongate member.
Claim 3
Dependent Claim
34 words
A device of claim 1 wherein the elongate member has a shear resistance of greater than about fifteen mpa during exposure to bone tissue over a period of time greater than about twelve weeks.
Claim 4
Dependent Claim
30 words
A device of claim 2 wherein the elongate member limits displacement to less than about one hundred and fifty microns over a period of time greater than about twelve weeks.
Claim 5
Dependent Claim
12 words
A device of claim 3 wherein the elongate member comprises a spike.
Claim 6
Dependent Claim
12 words
A device of claim 3 wherein the elongate member comprises a screw.
Claim 7
Dependent Claim
12 words
A device of claim 3 wherein the elongate member comprises a peg.
Claim 8
Dependent Claim
22 words
A device of claim 6 wherein the peg includes a head for providing an interference fit of the peg with the cup.
Claim 9
Dependent Claim
28 words
A device of claim 7 wherein the peg further includes a shank extending from the head for providing an interference fit of the peg with the bone tissue.
Claim 10
Dependent Claim
19 words
A device of claim 8 wherein the shank further provides an interference fit of the peg with the cup.
Claim 11
Dependent Claim
17 words
A device of claim 9 wherein the peg defines a receiving portion for receiving an insert tool.
Claim 12
Dependent Claim
21 words
A device of claim 10 wherein the shank includes a chamfered portion and a shank end located distally from said head.
Claim 13
Dependent Claim
15 words
A device of claim 11 wherein the peg comprises a biodegradable biocompatible polymer of lactide.
Claim 14
Dependent Claim
10 words
A device of claim 12 wherein the polylactide comprises poly(L(-)lactide).
Claim 15
Dependent Claim
15 words
A device of claim 11 wherein the peg comprises a biodegradable biocompatible polymer of anhydride.
Claim 16
Dependent Claim
15 words
A device of claim 11 wherein the peg comprises a biodegradable biocompatible polymer of glycolide.
Claim 17
Dependent Claim
107 words
In a method for fixing a prosthetic bone joint to a bone: the improvement comprising directing an elongate member, at least a portion of which is formed of a biodegradable biocompatible polymer, through an orifice defined by a cup of the prosthetic bone joint, said portion forming an interfering contact with said cup and with bone tissue of the bone, whereby displacement of said cup is sufficiently limited by the elongate member to allow bone tissue growth at the cup to fix the prosthetic bone joint to the bone and whereby the elongate member is biodegrated by body fluid at the bone tissue contacting the elongate member.
Claim 18
Dependent Claim
107 words
In a method for fixing a prosthetic bone joint to a bone: the improvement comprising directing an elongate member, at least a portion of which is formed of a biodegradable biocompatible polymer, through an orifice defined by a cup of the prosthetic bone joint, said portion forming an interfering contact with said cup and with bone tissue of the bone, whereby displacement of said cup is sufficiently limited by the elongate member to allow bone tissue growth at the cup to fix the prosthetic bone joint to the bone and whereby the elongate member is biodegrated by body fluid at the bone tissue contacting the elongate member.
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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) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |