Patent ID: 6613094
Filing Date: 2003-09-02
Classification: A61F

Abstract:
A profiled shaft for anchoring a hip-joint prosthesis in a femur, comprising:a shaft section having a generally rectangular cross section and having a proximal region, a distal region, a lateral side and a medial narrow side, wherein a trochanter wing is continuous with the lateral side of the shaft section in the proximal region, wherein the trochanter wing has an anterior broad side and a posterior broad side that are substantially perpendicular to the lateral side, wherein the trochanter wing has beveled edge surfaces, and wherein an angle formed between a plane of a beveled surface and a plane of an adjacent lateral surface is smaller than 135Â° and larger than 120Â°, wherein the shaft section on the lateral side merges with the trochanter wing in the form of a continuously bending curve, wherein each beveled edge surface has a first end at the lateral surface and a second end at the broad side, wherein the angle at the first end is different from another angle at the second end within the shaft section, wherein the angle at the first end is equal to the another angle at the second end at the trochanter wing, and wherein each beveled edge surface changes from an equal-angled facet to a facet with unequal angles within the region of the continuous curvature and in a direction from the shaft section to the trochanter region; and a fixation section formed at an end of the shaft section, which serves for a fixation of a spherical joint head, wherein the medial narrow side of the shaft section in the proximal region merges with a continuously curved arch that ends in a region of the fixation section.