Method and apparatus for acetabular reconstruction

摘要

A trial system for a prosthesis is described. The prosthesis can include an acetabular prosthesis generally for implantation in an acetabulum and the surrounding pelvis. The acetabular prosthesis includes an acetabular cup having a substantially concave inner surface and a substantially convex outer surface. One trial shell or a collection of trial shells are provided to trial a range of motion of the hip joint before implanting a shell prosthesis into the acetabular prosthesis.

主权项

1. An acetabular prosthesis system to replace at least a portion of an acetabulum of an anatomy, the system comprising:
a trial cup configured to be removably positioned relative to a first portion of the anatomy; a trial cement mantle member configured to be removably positioned in a selected first position relative to the positioned trial cup; a trial liner configured to be removably positioned at variable positions relative to the trial cement mantle member, the trial liner having an exterior convex surface, an interior concave surface opposite the exterior convex surface, a bottom edge defining a planar surface, and an elongated slot extending from the exterior convex surface to the interior concave surface, wherein the planar surface extends along a first reference plane, and wherein the elongated slot extends along a second reference plane generally perpendicular to the first reference plane; and a trial liner fixation member configured to removably secure the trial liner to the trial cement mantle member at each of the variable positions, the trial liner fixation member having a first portion extendable through the elongated slot of the trial liner, wherein the trial cement mantle member is positionable between the trial liner and the trial cup to replicate a cement mantle portion positionable between an implantable cup and an implantable liner, wherein the trial liner is configured to be positioned at variable positions relative to the trial cement mantle member, and wherein the enlongated slot facilitates a range of motion of the trial liner relative to the trial cement mantle member.