Proximal shape design of a custom-made stem of an artificial hip joint

Abstract

In the hip replacing arthroplasty, to make the stem shape of an artificial hip joint fit to the morphology of proximal femoral canal is generally effective to the fixation in an initial stage. Furthermore, it contributes to reduce a stress shielding at the proximal femur. So in this study, it was proposed that the design method of the custom-made stem corresponding to each patients with application to the X-ray CT image and a CAD system. It could improve the fill ratio of a stem to a proximal femoral canal which was largely deformed because of a secondary osteoarthrosis of a hip.