“…This is considered a more reasonable treatment method for most PM cases [ 3 , 65 ]. However, simple MPFL reconstruction is insufficient for the treatment of PM in cases of trochlear dysplasia [ 66 , 67 ]. Although the restraining forces are medially restored, as long as the VMO power decreases, the nonfunctional trochlear groove cannot effectively counteract the lateral tractional forces provided by the quadriceps femoris.…”