Fig. 2

Restored varus/valgus angles of 21 arthritis patients using MRI scans of the hip, knee and ankle obtained in a single global coordinate system and in the supine position. MA is determined by finding the femoral MA and tibial MA separately. Boundary conditions for the NBA approach are defined for the hip, knee and ankle and the NB axis is defined as described in the article. Angle Deviations of Femoral and Tibial MA to NBA Resections are reported. The NBA combined femoral and tibial cuts are oriented parallel to the ground and maintain global mechanical alignment stability