Patent ID: 8900319
Filing Date: 2014-12-02
Classification: A61F

Abstract:
1. An acetabular cup implant, comprising: a shell having an outer shell surface adapted for seating in a subject's pelvic bone, an inner shell surface, a shell opening, and a rim positioned peripheral to the shell opening and having a waveform shape, the waveform shape having at least one wave peak and at least one wave valley and a smooth articulation surface extending between the at least one wave peak and at the at least one wave valley; and a liner adapted for insertion into the shell, the liner having an outer liner surface, an inner liner surface, a liner opening, and a rim positioned peripheral to the liner opening and having a waveform shape, the waveform shape having at least one wave peak and at least one wave valley and a smooth articulation surface extending between the at least one wave peak and at the at least one wave valley; wherein the smooth articulation surfaces of the shell and liner contact each other and guide relative rotation of the shell and liner from a first position wherein the peak of the shell rim waveform is in contact with the peak of the liner rim waveform or between the valley and the peak of the liner rim waveform to a second position wherein the peak of the shell rim waveform is located in a valley of the liner rim waveform.