Cotyloidal implant has outer shell and inset with mating lugs to position them together

摘要

The cotyloidal implant has a cup (2) with a polar section and a equatorial section defining a cavity to receive an insert (4). The cup has an outer shell (3) surrounding the equatorial section of the cup and provided with trapezoidal lugs (10). The insert has peripheral lugs (17) extending radially. The shell has stops to prevent rotation.