Tibial prosthesis with polymeric liner and liner insertion/removal instrument
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United States of America Patent
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-
Dec 30, 1997
Grant Date -
N/A
app pub date -
Feb 20, 1996
filing date -
Feb 20, 1996
priority date (Note) -
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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.
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