Minimally invasive osteotomy involves removing a wedge-shaped bone block through a small incision on the medial side of the knee, leaving the outer intact bone as a hinge, closing the medial bone cortex to straighten the leg and finally fixing the plate on the medial side. This procedure causes little to no damage to the muscle tissue and the risk of injury is low. A special osteotomy plate is used to fix the leg firmly and the deformity does not usually recur.