The mechanism of fracture of the femoral prosthesis in total hip replacement.
Examination of the fractured stems of 70 Charnley, flat back, femoral prostheses suggested that the causative mechanism was a torisonal loading of the proximal portion on the distal part of the stem. The main loading on the hip is applied from an anterosuperior direction. The square corners of the stem and its implantation in retroversion predispose to fracture.
D006620:Hip Fractures / Q000503:physiopathology*; D006622:Hip Prosthesis; D006801:Humans; D008124:Locomotion; D011183:Postoperative Complications / Q000503:physiopathology*; D013314:Stress, Mechanical