Understanding the Cobb Angle
When a child is diagnosed with scoliosis, the first number parents hear is the Cobb angle — the degree of spinal curvature measured on an X-ray. This single measurement largely determines whether a child needs observation, bracing, or surgery.
At Central Ortho & Spine in Istanbul, we use full-spine digital X-rays on the first visit so families leave with a clear, evidence-based plan the same day.
The degree of curvature is not just a number — it is the decision point between watchful waiting, bracing, and surgery.
Below 25°: Observation
Curves under 25 degrees rarely progress significantly in children who have finished most of their growth. For a child still growing, we schedule standing X-rays every 4–6 months to track any change. No brace, no surgery — just careful monitoring. Many mild curves never worsen after growth stops.
25° to 45°: Bracing
The 25–45° range is the bracing window. Studies show a well-fitted brace worn 18+ hours a day can stop or slow progression in 72–75% of adolescent patients. The type of brace depends on where the curve is located: thoracic curves typically need a rigid TLSO brace, while lumbar curves may respond to a lower-profile design.
Bracing is discontinued once skeletal maturity is confirmed — usually 1–2 years after the end of puberty growth spurt, assessed by Risser grade on X-ray.
45° to 50° and Above: Surgery
When a curve approaches or exceeds 50 degrees in a still-growing child, surgery becomes the recommended path. Curves above this threshold tend to continue progressing even after growth ends, compressing the lungs and heart over decades. Left untreated, severe thoracic scoliosis can reduce lung capacity by up to 20% in adulthood.
The standard procedure for adolescent idiopathic scoliosis (AIS) is posterior spinal fusion with pedicle screw instrumentation. Average operating time at our centre is 3.5–5 hours. Most patients walk the following morning.
What About Growing Children With Large Curves?
For young children (under age 10) with severe curves — called Early Onset Scoliosis — traditional fusion is avoided because it stops growth in the fused segment. We offer growth-friendly options:
- Magnetically Controlled Growing Rods (MCGR): Surgically implanted rods are then lengthened non-invasively in clinic every 3–6 months using an external magnet — no repeat surgery needed for lengthening.
- VEPTR (Vertical Expandable Prosthetic Titanium Rib): Used when rib cage abnormalities are also present.
- Casting (Mehta casting): For infants and toddlers, serial plaster casts under general anaesthesia can sometimes reverse early curves entirely.
The right technique depends on the child's age, curve severity, and underlying diagnosis. A paediatric spine specialist — not a general orthopaedic surgeon — should make this decision.
What Surgery Does Not Mean
Parents often fear that spinal fusion will leave their child immobile. In reality, most adolescents return to swimming, cycling, and non-contact sport within 6 months. Competitive gymnastics and contact sports are typically restricted for 12 months post-op. Back pain later in life is not inevitable — outcomes studies at 20+ years show the majority of patients report satisfaction and minimal functional limitation.
Getting an Accurate Assessment in Istanbul
At Central Ortho & Spine, a scoliosis consultation includes a full-spine standing X-ray, Cobb angle measurement, Risser grading, and a detailed discussion of your child's growth status. International families can send prior X-rays by email for a preliminary opinion before travelling. If surgery is planned, we coordinate all pre-operative tests, anaesthesia assessment, and post-operative follow-up planning in a single 2-day visit.