Patent US5108441A successfully refreshed from Google Patents.
US5108441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of regenerating joint articular cartilage
Assignee: Individual
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Filing: 1990-07-17
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Granted: 1992-04-28
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Expires: 2010-07-17
Abstract
Abstract A method and apparatus of facilitating the regeneration of articular cartilage in a joint is disclosed. Regeneration of damaged articular cartilage is facilitated by placing one or more spacers between the articulating surfaces of the joint. The spacers are left in place while the articular cartilage regenerates. The spacers prevent the articulating surfaces from rubbing against each other and the articular cartilage can regenerate in the space between the articulating surfaces. A spacer formed in accordance with this invention has a head with a shaft extending therefrom. The shaft is inserted into one of the articulating surfaces so that the head is disposed between the articulating surfaces and keeps them separated while the articular surface regenerates.
Inventors
- 👤 Charles L. McDowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/40; A61F2/30721; A61F2/30724; A61F2/30756; A61F2/38; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/30749; A61F2/3877; A61F2/4081; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2002/30574; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2002/3085; A61F2220/00; A61F2220/0008
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
A method of facilitating regeneration of articular cartilage on an articulating surface in a joint, comprising the steps of: removing damaged articular cartilage from at least a portion of the articulating surface; positioning a plurality of spacers on the surface in spaced apart relation so as to effectively separate the surface from an adjacent surface; and allowing articular cartilage to regenerate on that portion of the articulating surface from which the damaged cartilage has been removed.
Claim 2
Independent Claim
76 words
A method of facilitating regeneration of articular cartilage on an articulating surface in a joint, comprising the steps of: removing damaged articular cartilage from at least a portion of the articulating surface; positioning a plurality of spacers on the surface in spaced apart relation so as to effectively separate the surface from an adjacent surface; and allowing articular cartilage to regenerate on that portion of the articulating surface from which the damaged cartilage has been removed.
Claim 3
Dependent Claim
24 words
A method according to claim 1, including the additional step of removing the spacers after the articular cartilage has regenerated on the articulating surface.
Claim 4
Dependent Claim
50 words
A method according to claim 1, wherein each of said spacers comprise a head and means for fixing the head in position on the articulating surface in spaced apart relation so as to allow for natural regeneration of cartilage in the areas between the spaced apart heads of the spacers.
Claim 5
Dependent Claim
38 words
A method according to claim 3, wherein said means for fixing the head in position comprises a shaft extending from the head and adapted for insertion into bony tissue underlying one of the articulating surface of the joint.
Claim 6
Dependent Claim
26 words
A method according to claim 4, wherein said shaft has an axially extending slot formed therein to facilitate insertion of the shaft into the bony tissue.
Claim 7
Dependent Claim
17 words
A method according to claim 4, wherein said shaft has a plurality of flexible flanges formed thereon.
Claim 8
Dependent Claim
11 words
A method according to claim 4, wherein said shaft is threaded.
Claim 9
Independent Claim
95 words
A method of facilitating regeneration of articular cartilage in a joint having articulating surfaces, comprising the steps of removing damaged articular cartilage from at least a portion of one of the articulating surfaces of the joint, implanting a plurality of spacers in spaced apart relation between the articulating surfaces so as to effectively separate at least that portion of the surface from which the damaged cartilage is removed from the adjacent surface, and leaving the spacers in place for a time sufficient to allow for regeneration of cartilage on said portion of the articulating surface.
Claim 10
Independent Claim
95 words
A method of facilitating regeneration of articular cartilage in a joint having articulating surfaces, comprising the steps of removing damaged articular cartilage from at least a portion of one of the articulating surfaces of the joint, implanting a plurality of spacers in spaced apart relation between the articulating surfaces so as to effectively separate at least that portion of the surface from which the damaged cartilage is removed from the adjacent surface, and leaving the spacers in place for a time sufficient to allow for regeneration of cartilage on said portion of the articulating surface.
Claim 11
Dependent Claim
20 words
A method according to claim 8, including the additional step of removing the spacers after regeneration of the articular cartilage.
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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) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |