[The practice of CAD custom femoral prosthesis and the computer simulated biomechanical experiment]

The present study was carried out to verify the accuracy and feasibility of the CAD program and to demonstrate whether the custom prosthesis is superior to the commercial ones. We modified the previously developed CAD (computer aided design) program, and buildt up a three-dimensional (3D) model of the custom femoral prosthesis by using the modified program and Canny algorithm; therefore, a basic foundation for the CAM (computer aided manufacture) was laid. Through the computer simulated biomechanical experiment on the prostheses, we came to the conclusion that the custom designed prosthesis has a better biomechanical characteristic. The future for this kind of prosthesis in THA(total hip arthroplasty) is very promising and it can be successfully applied in clinical practice through the CAM.