Almost every scoliosis appointment involves a discussion of “degrees” and “Cobb angle.” Understanding what this number means and what it doesn’t, helps families interpret x-rays and treatment decisions with more confidence.
The Cobb angle is the standard way of measuring the size of a scoliosis curve. On an x-ray, clinicians identify the most tilted vertebra at the top and bottom of the curve and draw lines along their endplates. The angle where these lines intersect is the Cobb angle.
While exact cut-offs vary slightly, Cobb angles are often grouped as:
These bands help guide monitoring and treatment recommendations.
It’s important to remember that x-ray measurements have a small margin of error, often around 3–5 degrees. A change from 18° to 20° may not be clinically meaningful, whereas a change from 18° to 28° certainly is. At Dorsi, we always interpret numbers in context.
The same Cobb angle can mean different things at different ages:
That’s why we pair Cobb angle with growth status and curve pattern when planning care. We utilise a special calculation to assess progression risk.
Dorsi Spinal Institute uses repeat imaging at safe intervals to track Cobb angle over time. We look for:
Change, not just a single number, often drives decisions.
We believe numbers should never be a mystery. At Dorsi, clinicians sit down with families to show x-rays, explain Cobb measurements, and discuss what the current angle means practically, today and in the future.
If you’ve been told a Cobb angle but don’t fully understand its implications, bring your imaging to Dorsi Spinal Institute. We’ll translate technical details into clear, usable information and a tailored plan.
Related reading: see our blogs on official diagnosis, understanding your child’s diagnosis, and curve correction outcomes.
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Adolescent idiopathic scoliosis (AIS) is the most common form of spinal curvature in young people. It typically appears around puberty and, without treatment, can progress during growth spurts.
AIS usually affects children between 10 and 18 years old. Girls are more likely than boys to develop curves that require treatment, although boys are certainly not immune.
AIS curves often occur in the:
Pattern recognition helps predict how curves may change over time.
The exact cause of AIS is unknown, but contributory factors include:
Diagnosis of AIS includes clinical examination, x-rays, and assessment of growth status. Dorsi Spinal Institute also uses digital posture analysis and 3D scans where indicated.
Management options range from:
Our goal is to minimise impact on daily life while maximising long-term outcomes.
If your child has been diagnosed with AIS—or you suspect a curve is forming—Dorsi Spinal Institute can provide a comprehensive evaluation and a growth-sensitive treatment plan.
Related reading: see our posts on early screening, family history, and bracing plus exercise.
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