Which treatment works the best and fastest for legg-calve-perthes disease?

Lagg-calve-perthes: Treatment depends if having pain or not, age (<5yo, 5-7 yo, 7-12, older than 12yo. Could be as simple as taking tylenol, (acetaminophen) rest. Or more complex as having surgical contaiment, surgey. There could be complication as stiffness-loss of rotation, arthritis, limb-lenght discreptancy. My advice is to work with an pediatric orthopedic. They are very good at this.

Varies with age: Primary goals of treatment are to alleviate pain and to prevent lasting deformity of the femoral head. Treatment often depends on age and severity.Before 6 yrs rest, avoid strenuous exercise, use range of motion exercises,crutches, walker, or casts, abduction bracing.Sometimes operations for older patients including femoral and iliac osteotomies.