Patent ID: RE44803

Claim:
An anti-impingement femoral prosthetic component, comprising: a stem having a distal portion adapted for placement within an intramedullary canal, a proximal end which remains externally exposed subsequent to fixation, and a longitudinal axis, “s”; a head having a center configured to co-act with a corresponding acetabular component; a coronal plane being defined as the plane which intersects “s” and the center of the head; a neck connecting the stem to the head, the neck having superior and inferior surfaces and a central region defined as the region of the neck between a line parallel to “s” along the most medial aspect of the stem and a line parallel to “s” and tangent to the lateral outer surface of the head closest to the superior surface of the neck; and wherein the superior and inferior surfaces surface of the neck define defines smooth, continuous curves in the coronal plane, and the inferior surface of the neck is curved or angled in the coronal plane, with the apex of each curve surface being oriented distally, establishing a superior concave surface to reduce impingement of the central region of the neck on the acetabular component, thereby facilitating an enhanced range of motion in flexion/internal rotation and extension/external rotation.