Tibial component for a knee prosthesis

Details Tibial component for a knee prosthesis Tibial component for a knee prosthesis

1988-06-13

1989-11-28

Apley, Richard J.

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

623 18, A61F 238

Patent

active

048834882

ABSTRACT:
An improved tibial component is provided for a knee prosthesis, wherein the tibial component includes a pair of tibial tray members adapted to accommodate independent longitudinal shifting during patient function while retaining a secure and stable fixation with respect to patient bone. The two tibial tray members comprise medial and lateral members for supporting the medial and laternal condyles of a knee joint. These tray members are interconnected by a slide key arrangement which restrains the tibial tray members against relative movement in the anterior-posterior and medial-lateral directions, while permitting relative shifting in a longitudinal direction corresponding generally with a central axis of the patient's tibia. In the preferred form, the two tibial tray members cooperatively define a common anchoring post and include one or more antirotation fins for mechanically locking with patient bone. In addition, in the preferred form, the two tray members include appropriate bone ingrowth surfaces for secure noncemented attachment to patient bone.

REFERENCES:
patent: 3488779 (1970-01-01), Christesen
patent: 3605123 (1971-09-01), Hahn
patent: 4714473 (1987-12-01), Bloebaum
patent: 4759767 (1988-07-01), Lacey

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