Patent ID: 7578850

Claim:
A unicondylar knee prosthesis comprising: a tibial bearing component including: a top portion having an articulating surface; and a bottom portion connected to the top portion; and a tibial tray component including: a tray member; and a keel connected to a distal surface of the tray member wherein the keel includes: a vertical keel section extending from the distal surface of the tray member, wherein the vertical keel section has a horizontal dimension; and a posterior sloped and posterior tapered keel foot having a tapered angle leading from an anterior aspect to a posterior aspect of the keel foot, such that the anterior aspect is closer to a front of the knee prosthesis than, and wider than, the posterior aspect, extending horizontally away from the vertical keel section, and spaced away from the distal surface of the tray member, thereby the keel foot defining a horizontal dimension, wherein said horizontal dimension of said keel foot is larger than said horizontal dimension of said vertical keel section; and wherein the tibial tray component is to be implanted into a prepared tibia and the tibial bearing component is to be attached to the tibial tray component.