| 摘要 |
An acetabular cup 10 comprises an outer shell 12, an inner liner 14 receivable by the outer shell 12, and a two-part polygonal engagement element 16 at an interface between the outer shell 12 and the inner liner 14. The two-part polygonal engagement element 16 includes a Reuleaux polygon. The two-part engagement may be a protrusion 48 and recess 50 arrangement. An acetabular cup system utilising the said two-part acetabular cup 10, a second inner liner formed of a different material to the first inner liner 14, and a two-part taper engagement element at an interface between the outer shell 12 and the second inner liner. A method of inhibiting rotational disassociation of an inner liner 14 of an acetabular cup 10 when engaged with an outer shell 12 by means of a polygonal engagement 16. |
