Thoracic curve
Main thoracic curves are the most common pattern in adolescent idiopathic scoliosis, typically convex to the right with the apex near T8–T9. Vertebral rotation here also rotates the attached ribs, producing a rib prominence.
The Cobb angle
Measured on a standing frontal radiograph: lines are drawn along the upper end plate of the most tilted vertebra at the top of the curve and the lower end plate of the most tilted vertebra at the bottom. The angle between them (or their perpendiculars) is the Cobb angle.
42° — Severe. Curves of 40–50° and above are at higher risk of progression into adulthood.
Vertebral rotation
Scoliosis is three-dimensional. Vertebrae near the apex rotate so their bodies turn toward the convex side and their spinous processes toward the concave side. Try the Rear view to see it.
Educational simulation built from a generic procedural model. It is not a patient-specific reconstruction and must not be used for diagnosis or treatment planning.