US5152797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular prosthesis
Assignee: Johnson and Johnson Professional Inc
•
Filing: 1991-10-25
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Granted: 1992-10-06
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Expires: 2011-10-25
Abstract
Abstract A modular prosthesis system having generally planar bone contact surface (14) with an undercut edge (16) around the periphery of the surface and includes augmentation devices (15) which can be attached to the planar surface with a cam locking mechanism (17) secured to the undercut edge to increase the thickness of the prosthesis. <IMAGE>
Inventors
- 👤 Thomas Luckman
- 👤 Keith W. Greer
- 👤 Kenneth G. Arsenault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30771; A61F2/30721; A61F2/30734; A61F2/38; A61F2/389; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30476; A61F2002/30518; A61F2002/3052; A61F2002/30535; A61F2002/30604; A61F2002/30736; A61F2002/30836; A61F2002/30878; A61F2002/30884; A61F2220/00; A61F2220/0025; A61F2220/0033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A prosthesis system comprising a prosthesis having a at least one substantially planar surface, a recess in said planar surface said recess having an undercut edge adjacent at least a portion of its periphery, and an augmentation device adapted to increase a dimension of the prosthesis, said augmentation device having a proximal surface to contact the planar surface of the prosthesis and a distal surface opposite the proximal surface to contact the bone, a cam locking mechanism on the proximal side of the device to engage with the recess on said planar surface of the prosthesis to secure the augmentation device in position on the planar surface of the prosthesis.
Claim 2
Dependent Claim
110 words
A prosthesis system comprising a prosthesis having a at least one substantially planar surface, a recess in said planar surface said recess having an undercut edge adjacent at least a portion of its periphery, and an augmentation device adapted to increase a dimension of the prosthesis, said augmentation device having a proximal surface to contact the planar surface of the prosthesis and a distal surface opposite the proximal surface to contact the bone, a cam locking mechanism on the proximal side of the device to engage with the recess on said planar surface of the prosthesis to secure the augmentation device in position on the planar surface of the prosthesis.
Claim 3
Dependent Claim
22 words
The prosthesis system of claim 1 in which the opposed surfaces of the augmentation device are angled in respect to each other.
Claim 4
Dependent Claim
21 words
The prosthesis system of claim 1 which includes a plurality of augmentation devices, each of said devices having a different thickness.
Claim 5
Dependent Claim
46 words
The prosthesis system of claim 1 in which the cam locking mechanism includes a cam having a shaft eccentrically affixed to the cam and in which the edge of the cam is beveled to engage an undercut edge of the recess when the cam is rotated.
Claim 6
Dependent Claim
54 words
The prosthesis system of claim 4 in which a pawl is affixed to the cam and in which the distal surface of the augmentation device has a locking cavity to accept the pawl, said cavity having locking means on its edge to lock the pawl in a predetermined position when the pawl is rotated.
Claim 7
Dependent Claim
32 words
The prosthesis system of claim 5 in which the locking means comprises at least one tooth on the pawl and at least one tooth cut into the periphery of said locking cavity.
Claim 8
Dependent Claim
30 words
The prosthesis system of claim 1 in which the mechanism to secure the augmentation device includes a lug having a beveled edge adapted to engage the edge of the recess.
Claim 9
Dependent Claim
58 words
The prosthesis system of claim 1 which is a tibial component of a knee prosthesis, and in which the tibial component includes a stem on the distal surface of the component, said augmentation device further comprises an opening of a size to allow said stem to pass through said device when said device is secured to said prosthesis.
Claim 10
Dependent Claim
25 words
The prosthesis system of claim 3 in which the augmentation devices further include devices with different angles between the proximal surface and opposed distal surface.
References Cited (Backward Citations)
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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) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |