Femur cap has spherical outer surface with opening, cavity in spherical segment, and opening

摘要

The cap (6) has a spherical outer surface (7) with an opening (10). The interior extends from one edge of the cap's opening to a pole (11) facing the cap's opening. The wall of the cap is defined between the outer surface and the interior, and contains a cavity (12) in a spherical segment and on the cap's opening. The cap is placed on the femur's (1) hip-head (3).