Tibial element for a replacement knee prosthesis
AssigneeHowmedica International Inc.
InventorsAlan M. Ashby, Peter Lawes
Life of this patent
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Abstract
A prosthetic tibial component has a tibial tray having an underside for engaging a prepared tibial plateau. The tibial component has a stem having a tapered connection at one end. The stem has a non-symmetrically shaped bone engagement element extending therefrom. The tray includes a tapered connection element for mating with the tapered connection element on the stem. The tray includes an alignment element for locating and engaging the bone engagement element on the stem to locate the stem at a predetermined position relative to the tibial plateau.
Claims10
A tibial element for a replacement knee prosthesis comprising a tibial tray provided with at least one bearing component and a stem which can be attached to said tray by a tapered spigot and socket construction, said stem including at least two radially extending fins said tray having a lower portion including at least two radially extending fins intended for engagement with a proximal subcondylar area of the tibia, and means formed on said fin on said tray are included for engaging and locating said fin on said stem in a predetermined angular position in relation to said fins on the tray.
A prosthetic tibial component comprising:
- a tibial tray having an underside for engaging a prepared tibial plateau, a stem having a tapered connection element at one end thereof, and said stem having at least two bone engagement elements in the form of radially extending fins for engaging said bone, said tray including a tapered connection element for mating with said tapered connection element on said stem, and said tray including at least two fins for engaging and locating a respective one of said at least two radially extending fins on said stem to locate said fins on said stem in a predetermined angular position in relation to said tibial plateau.
Dependencies are inferred from the claim text.