Abstract: A orthopedic leg appliance includes opposed pairs of cuff members that may be attached a patient's legs and adjusted relative to one another to apply torsional forces to the upper legs. The appliance includes two pairs of cuff members. First cuff members are mountable to the patient's upper legs while lower cuff member mount to the lower legs. The cuff members are held by knee hinge mechanisms for a free pivotal movement between selected limits. A cross member extends between the cuff pairs and includes torsional adjustment mechanisms and breakaway hinge mechanisms. The torsional adjustment mechanisms allow for selected torsional settings of the cuff members to apply rotational forces to the patient's legs. The breakaway hinge mechanism facilitates relative pivotal motion of the cuff pairs toward and away from one another between operative and inoperative positions without affecting the torsional settings. The inoperative position facilitates mounting and dismounting of the cuff members to the patient's legs.