Hip prosthesis with flared porous bony ingrowth pads

摘要

A femoral hip prosthesis is provided with porous bony ingrowth material on each of the anterior and posterior sides. The bone ingrowth materials on each side flare or expand outwardly in the proximal direction with respect to the sides of the prosthesis, to provide a wedge shaped configuration of at least 1 millimeter increase in thickness at the upper proximal end of the porous materials from the point where the expansion begins. By impacting the prosthesis in the surgically prepared opening in the femoral canal a wedge tight fitting is achieved to assure initial stabilization of the prosthesis for a sufficiently long period of time, e.g. about six weeks or more, until bony ingrowth into the porous materials has occurred to provide long term stabilization. The distal end of the stem of the prosthesis is chamfered anteriorly and posteriorly so that the prosthesis can be used for either the right leg femur or left leg femur without impinging on the anterior bow.