Load actions transmitted by implants

The authors consider the mechanics of load transmission between a "conventional" femoral head replacement prosthesis and the shaft of the femur. The three dimensional loading pattern is now well known and the changes of interface stressing through a load cycle is considered. The actual stress situation depends on features of the implantation technique, the mechanical properties of all the materials involved in the relevant friction coefficient. From analysis of systems at the extreames of these limits, the authors suggest probable service conditions.