 This is a non-blinded, randomized controlled trial for testing two brace weaning protocols namely immediate removal of brace or gradual weaning of brace over a course of 6 months for adolescent idiopathic scoliosis AIS patients. These patients will have follow-up visits at 6-month and 12-month intervals. By comparing between the two groups in terms of change of Cobb angle, truncal balance, health-related quality of life measures and their health-care costs at the set time-points, the investigators aim to gain insights of whether different brace-weaning protocol will be more beneficial and cost-effective in patients clinical and quality of life measure outcomes. 