Patent ID: 7914585

Claim:
A hip prosthesis configured for cementless implantation comprising a shaft configured to be inserted into a femur and a femoral neck extending medially relative to an implanted position of the prosthesis in the femur, the shaft having a proximal part configured to be inserted in a metaphyseal region of the femur and a distal part configured to be inserted into a diaphyseal region of the femur, the proximal part comprising fins that project from front and rear faces of the proximal part, each fin extending from a distal end of the proximal part to a proximal end of the proximal part and having a steep medial flank oriented in a medial direction relative to the implanted position, the steep medial flank enclosing an angle between 5° and 15° with respect to a longitudinal axis of the shaft, the width of the fins increasing from the distal end to the proximal end of the proximal part, the height of the fins decreasing in a lateral direction, relative to the implanted position and perpendicular to the longitudinal axis of the shaft, from the medial edge, the distal part comprising diaphyseal anchoring projections.