The curvature of the human femoral condyle can be represented by the Archimedean spiral. The center of the Archimedean spiral was found to be situated in the attachment of P. C. L., M. C. L. and L. C. L. of the femoral condyle.
We allowed early weight-bearing and ankle movement after operation for ankle fractures of supination-external rotation injury type. As this method gave better results in a follow-up, we think that this method can be applied to another fracture types too.