IMPLANT SYSTEM WITH PE INSERT AND TWO TRAY OPTIONS

摘要

A tibial implant system has an ultra-high molecular weight polyethylene tibial insert which can engage with either one of two tibial trays through differing means of engagement. The tibial insert includes a locking wire and locking tab disposed along an anterior surface and a locking recess disposed along a posterior surface. A first polymeric tibial tray includes a bead along an anterior wall and an undercut area along a posterior wall. A second metallic tibial tray includes a plurality of barbs along an anterior wall and an undercut area along a posterior wall.

主权项

1. A tibial implant system comprising
a polymeric tibial insert having a locking feature disposed along an anterior surface and a locking feature disposed along a posterior surface, a first tibial tray, made of a polymer, having a bead along an anterior wall and an undercut area along a posterior wall, and a second tibial tray, made of a metal, having a plurality of barbs along an anterior wall and an undercut area along a posterior wall, wherein the anterior and posterior surfaces of the tibial insert are configured to lockingly engage, respectively, with both the first or second tibial tray anterior and posterior walls, and wherein engagement areas between the anterior surface of the polymeric tibial insert and the anterior wall of the first tray differs in shape from the engagement areas between the anterior surface and the second tibial tray anterior wall.