Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1996-02-20
1997-12-30
Milano, Michael J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, 606 99, A61F 238, A61F 230, A61F 200
Patent
active
057024634
ABSTRACT:
A tibial prosthesis apparatus and its insertion/removal tool includes a tibial tray that receives a polymeric tray liner with an articulating surface. Dovetail connections are provided for interconnecting the liner and the tibial tray. An instrument is provided that can either insert or remove the liner relative to the tray. The surgeon is provided with cam and hook portions that are at the hooking end of the instrument opposite the lever end. The cam engages the anterior surface of the liner while the hook attaches to the tibial tray and the lever end is rotated to cam the insert into a locked position during insertion. The hook engages the distal side of the liner so that the surgeon can rotate the instrument to disengage or remove the liner from the tray.
REFERENCES:
patent: 2789558 (1957-04-01), Rush
patent: 4364389 (1982-12-01), Keller
patent: 4459985 (1984-07-01), McKay et al.
patent: 4714474 (1987-12-01), Brooks, Jr. et al.
patent: 5344461 (1994-09-01), Phlipot
patent: 5405396 (1995-04-01), Heldreth et al.
Givens Derrick
Marik Gregory C.
Pothier Albert
Milano Michael J.
Nguyen Tram Anh T.
Smith & Nephew Inc.
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