Inclusion Criteria:  Cobb 15-24 degrees Skeletally immature, Sanders score of 4 or less and Risser < 2. No menarche for females Aged 9-15 years Apex of the primary curve at T7 or caudal  Exclusion Criteria:  Non-idiopathic scoliosis (i.e. neuromuscular, syndromic or congenital scoliosis) No previous surgical or brace treatment for scoliosis