Patent ID: 6706073
Filing Date: 2004-03-16
Classification: A61F

Abstract:
A femoral component for an artificial hip joint for uncemented implementation characterized by:a prosthesis comprising a stem having a proximal end, a remote tip end, a dorsal side, a ventral side, a medial side, and a lateral side, the stem having a central axis configured to be substantially coaxial with a femoral canal in which the stem is placed; the stem having a concave indentation on the dorsal side extending axially from the proximal end toward the tip and engaging the bone structure of a femoral neck at a transition region to a greater trochanter of the femur; the stem concave indentation being symmetrical right to left from a center; the proximal end of the stem having a stem section medial side configured to mate with internal structures of the femoral neck of the femur; a cone for mounting a replacement femur head on the proximal stem section; the proximal stem section having a support surface for the cone and the stem proximal section joining a lateral stem section that fits into the femoral canal of the femur; the length of the stem along the central axis being between 4.5 cm and 11 cm; and the stem proximal section having an outer surface configured to contact the inside of the femoral neck dorsally, medially and ventrally through its concave shape.