Bearing fixation

摘要

Disclosed is a method of engaging a bearing liner within a shell member with an integrated projection portion. The integrated projection portion may deform a selected amount during positioning of the bearing liner within the shell. The shell may include a complementary engaging portion.

主权项

1. A method for providing an acetabular prosthesis including a bearing liner within a shell, comprising:
moving the bearing liner into a concave interior of the shell, wherein the shell has an exterior surface configured to engage an anatomy and the bearing liner has an exterior wall surface configured to be received within the concave interior of the shell, the exterior wall surface extending from a rim of the bearing liner towards an apex of the bearing liner along a substantially continuous curve; engaging an axial fixation projection that extends from the substantially continuous curve of the exterior surface at least on the concave interior of the shell; deforming the axial fixation projection from a first configuration to a second seated configuration; and seating the axial fixation projection within a groove formed through the concave interior of the shell to implant the bearing liner within the shell, wherein the second seated configuration is achieved at least at seating the axial fixation projection within the groove; wherein deforming the axial fixation projection includes substantially permanently moving a material forming the axial fixation projection to bias the volume of material between a mid-line and a rim of the bearing liner.