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P.J. Erasmus, M. Thaunat
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Illustration 1 : MPFL tight in extension
Illustration 2 : MPFL lax in flexion
Fig. 1: Femoral position more proximal, MPFL is now more lax in extension and tighter in flexion.
Fig. 2: Femoral position more distal, MPFL tighter in extension and more lax in flexion.