Fig. 1

A change in tibial torsion angle (TTA) pre- and postoperation on axial computed tomography was measured. TTA, an angle formed by the axis through the posterior tangent of the widest proximal tibial condyles to the transverse axis that bisects the anteroposterior (AP) diameter of the lower end of the tibia and passes through the anterior half of the lateral malleolus in the axial plane, using computed tomography (CT)