Patent ID: 8801797

Claim:
A joint socket for a hip endoprosthesis, comprising: a socket shell configured to be implanted in the pelvic bone of a patient, the socket shell having an inner surface that defines an accommodating space extending about an axis of rotation; and a socket insert configured to provide a bearing for a joint head of a prosthesis stem, a spherical outer surface of said socket insert configured to be disposed in the accommodating space of the socket shell and contact the inner surface of the socket shell along a line of contact that is concentric with the axis of rotation of the accommodating space of the socket shell, the line of contact being surrounded by and intersecting the spherical outer surface of the socket insert, the socket insert coupleable in a self-locking manner within said accommodating space along said line of contact, wherein the inner surface of the socket shell tapers toward a pole of the shell in a region on either side of said line of contact in such a manner that a radius of curvature of the taper of the inner surface of the socket shell in the region of said line of contact is greater than the spherical radius of the outer surface of said socket insert at said line of contact when the shell and insert are in contact with each other.