Revision knee tibial locking mechanism

摘要

A tibial prosthesis assembly including a tibial component and a tibial insert. The tibial component includes an inferior bone engaging surface, a superior surface, and a first retention feature. The tibial insert includes an inferior tibial component engaging surface, a superior bearing surface, and a second retaining feature. The first and the second retaining features cooperate to mate the tibial insert with the tibial component at one of a plurality of fixed rotational orientations relative to the tibial component.

主权项

1. A tibial prosthesis assembly comprising:
a tibial component including an inferior bone engaging surface, a superior surface, a side surface joining the inferior bone engaging surface and the superior surface to define a perimeter, a first stem extending from the inferior bone engaging surface, and a first retention feature including a receptacle defined by the tibial component and extending into the first stem, the receptacle including a plurality of first splines extending into the first stem and arranged directly adjacent to one another about an entirety of the receptacle; and a tibial insert including an inferior tibial component engaging surface, a superior bearing surface, an outer portion joining the inferior tibial component engaging surface and the superior bearing surface, a second stem extending from the inferior tibial component engaging surface, and a second retaining feature including a plurality of second splines directly adjacent to one another and extending along a length of the second stem about an entirety of an outer surface of the second stem; wherein the plurality of second splines are configured to indexably mate with the plurality of first splines; wherein the first and the second retaining features cooperate to mate the tibial insert with the tibial component at one of a plurality of fixed rotational orientations relative to the tibial component; and wherein the plurality of fixed rotational orientations includes multiple orientations where the outer portion remains fully within the perimeter.