Abstract: Systems, devices, and methods are provided for aligning acetabular implants. A patient-matched acetabular alignment tool is used to orient tools and implants intraoperatively. The patient-matched acetabular alignment tool includes a mounting member and leg members which are configured based on the particular patient's anatomic landmark sites (e.g., acetabular bony landmarks). The leg members are attached to the mounting member and configured to connect with a respective anatomic landmark site to achieve a desired implant angle and axis. For example, the leg members may form a tripod support base through which an acetabular shell may be inserted into the patient's acetabulum at desired angles of version and inclination. In some embodiments, the leg members may be retractable and expandable with respect to the mounting member, thereby providing a tool with reduced profile for inserting the device in the patient's soft tissue.

Abstract: An acetabular liner insertion guide (10) aligns a liner (12) within an acetabular shell. The liner includes a ring (16) and a penetrable layer (14). The ring includes a lip configured to rest on an upper surface of the acetabular shell. The ring is also configured to attach to the liner such that an upper surface of the liner is in a plane that is generally parallel to a plane that includes the upper surface of the acetabular shell. The penetrable layer is configured to receive an impactor and overlie the liner. When the insertion guide is placed on the shell and the impactor impacts the liner, the insertion guide separates from the liner and remains on the impactor.