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By means of two-dimensional photoelastic stess analysis, we studied surface stress distribution of the acetabulum and proximal of the femur following the intertrochanteric double osteotomy for the treatment of coxa vara.One normal hip joint as a creterition and 2 cases of coxa vara with limp and positive Trendelenburg sign were studied.The plat model of the bony parts of the hip joint was made of epoxy resin, and that of the cartilainous portion was made of cilicon.The model was loaded by a loading apparatus consisted of the resultant hip joint force and the power of abductor muscle pull.The results are as follows.1. The stress on surface of the hip joint neither increased nor concentrated after intertrocanteric double osteotomy.2. The remarkable normalization on principal stress trajectories in femoral neck was found after surgery, because of the anatomical correction of the proximal femur.
西日本整形・災害外科学会の論文