An outer shell (1) for a joint socket implant, in particular an acetabular implant, comprises a convex outer face (3) and a concave inner face (4) for accommodating an inner shell. The concave inner face (4) at least partially has teeth (7) in a particularly circular peripheral region (6). The teeth (7) prevent the two shells from being able to rotate relative to each other when the inner shell is inserted into the outer shell (1).
