Abstract: A method of producing an individually adjusted endoprothesis pin includes: processing X-ray data of the bone density into a subset of tomographs showing a succession of parallel cross-sections of the bone; selecting from the subset a succession of parallel measuring planes determining from the contours of the bone cavity a structural center line and an antetortion plane of the pin; checking and adjusting desired dimensions of the pin in view of its withdrawal from the bone cavity; and machining a raw sample of the pin to form a succession of parallel disk-shaped steps corresponding in height to the spaces between the parallel planes.

Abstract: An endoprosthesis insertable in a bone cavity comprises an anchoring shaft having circular steps at least in supporting regions (X,Y) of the anchoring shaft in which a support of said anchoring shaft in the bone takes place. The shaft has at a free end remote from a mouth of the bone opening a straight portion. The steps are formed in at least the straight portion one after another without undercuts. The shaft conically widens from said end towards an end opposite to said free end. The steps have contours which are at least in the region in which the steps are supported in the bone, individually adjusted to respective cross-sections of the bone hollow, which cross-sections exist at the positions of the individual steps when the endoprosthesis is inserted into the bone.