The Computer Assisted Design Of The Custom Femur Prosthesis And Relative Research

1.The Measurement of the Proximal Femoral Parameters in the Healthy ChineseObjective To explore the characteristics of proximal femoral parameter in the healthy Chinese and provide anatomic basis for the design and research of the domestic prosthesis. Methods 100 computed radiographs perpendicular to the hip joint were selected. randomly and the proximal femoral parameter were measured by means of Unisight software. These parameter include diameter of femoral head, length of femoral neck, neck-shaft angle, offset, high of femoral head, the width of bone medullary cavity at the plane of lesser trochanter, 20mm above and below the lesser trochanter, diameter and high of the narrow cavity, canal flare index (CFI) and metaphyseal canal flare index (MCFI). The proximal femoral parameters among the Chinese, American and European were compared. Results There were significant differences in the proximal femoral parameters between ours and American and European, especially in aspect of offset, high of femoral head, diameter of femoral head, the width of bone medullary cavity at the plane of lesser trochanter, 20mm above and below the lesser trochanter and diameter of the narrow cavity. The percentage of funnel-shaped femora (CFI >4.7) in our group are larger than those of the American or the European(P<0.01),which is 20%, 8%, and11.5% respectively, but there was no significant difference between ours and other domestic scholar's. Conclusion The normal parameter database of the healthy Chinese proximal femora is established. Proximal femoral parameter differs a lot between each individual. It is necessary to design the femoral prosthesis fitting the features of the femurs of the Chinese femoral. Computed radiograph system is facility to the research of the morphology of the proximal femur and the measurement of relative parameters and the survey of the characteristics of Chinese femoral. It is important for research and manufacture of the domestic prosthesis to set up a database of the healthy Chinese proximal femora.2. The Computer Assisted Design of the Custom ProsthesisObjective To develop a set of medical image processing software and computer assisted...