| abstract |
The invention relates to a non-guided bioceramic endoprosthesis for basic joints of the toes and fingers. The task was to produce a non-guided endoprosthesis for small joints, which is to replace the joint surface in the case of a joint body that has not yet been destroyed. An articular surface replacement on basic joints of fingers and toes is presented, which consists of a distal and a near-body joint part, which are anchored in the adjacent bones, in which the joint parts consist of spherical shell bodies, which are provided with a through hole and are made of bioceramics and are anchored in the sponious joint bodies with self-tapping screws, the body shell close to the body is bulged towards the joint gap and the cavity is pressed into the stressed parts of the joint surface of the metacarpal bone or metatarsal head, the body shell away from the body has a hollow arch modeled from the natural joint surface of the base bone base with the bulging side pressed into the basic limb bones, the bulges of the joint-side surfaces have approximately the same radii and the body-near joint part has a larger area than de r has distal joint part. |