For example, an orthopedic surgeon performed femoral varization derotational osteotomy for coxa valga and increased femoral anteversion. The surgeon planned to adduct the distal fragment 45 ...

3D angle: angle between the mechanical axes before and after derotation.

Corrections of the lower limb anatomy—varus derotation osteotomy or better: varus detorsion osteotomy —are therefore gaining increasing importance in the therapeutic repertoire (2, 3).