In the management of Adolescent Idiopathic Scoliosis (AIS) with remaining skeletal growth (Risser sign 0-2), what Cobb angle threshold generally indicates the transition from physiotherapeutic observation/PSSE alone to rigid spinal bracing (e.g., Boston or Cheneau brace)?
- ACobb angle between 20° and 40°
- BCobb angle between 5° and 10°
- CCobb angle between 65° and 80°
- DBracing is never indicated regardless of Cobb angle