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. 2017 Dec 29;18:553. doi: 10.1186/s12891-017-1904-7

Fig. 1.

Fig. 1

Pillar-Crane-Model frontal view; a virtual anatomical axis regardless of femoral bowing; b introducing “AMA at cutting”, which is needed for exact calculations; c when derotation of the proximal limb is performed, increase of AMA at cutting, and increase of mLDFA will occur