The invention relates to total hip joint replacements in humans in which the ball-like head of the femur and the cup-shaped cavity of the acetabulum are replaced by metal, plastic or ceramic substitutes and, more particularly, to a device for cutting screw threads in the walls of the acetabulum to receive...http://www.google.com/patents/US4611587?utm_source=gb-gplus-sharePatent US4611587 - Device for cutting threads in the walls of the acetabular cavity in humans
