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What is a Cobb Angle?

You may have heard the term "Cobb angle" during your child’s appointments. Cobb angles measure the degree of your child’s spinal curve and help healthcare providers classify scoliosis and determine the most appropriate treatment pathway. The Cobb angle is calculated using an X-ray of the spine.

How is the Cobb Angle Measured?

When calculating the Cobb angle, the clinician follows several steps:

1. Identifying the Upper Limit of the Curvature

The clinician first identifies the most tilted vertebrae in the upper part of the curve. This marks the uppermost point of the curvature and is located above the curve’s apex.

2. Identifying the Lower Limit of the Curvature

Next, the clinician identifies the most tilted vertebrae in the lower part of the curve, which tilts in the opposite direction from the uppermost point.

3. Calculating the Angle Itself

To determine the Cobb angle:

  • Straight lines are drawn along the upper and lower limit vertebrae, aligning with their natural tilt.
  • From each of these lines, a perpendicular (right-angled) line is drawn inward toward the center of the curve.
  • These right-angled lines extend until they intersect, forming an ‘X’ shape.
  • The Cobb angle is the angle formed between the intersecting lines at the top or bottom of the ‘V’ shape.

What Do Cobb Angles Indicate?

Cobb angles help determine the most appropriate treatment pathway; however, other factors such as skeletal maturity, underlying causes, family history, and posture are also considered. Below is a general guide to treatment recommendations based on Cobb angle measurements.

0 - 10 Degrees

  • Mild curves (0 - 10 degrees) are typically monitored with X-rays every six months to check for progression.
  • Physiotherapy may be recommended, especially if the child has poor posture.

10 - 20 Degrees

  • Curves between 10 - 20 degrees should be considered for physiotherapy tailored to the specific curve classification.

20 - 55 Degrees

  • Bracing is recommended for curves between 20 - 55 degrees.
  • Physiotherapy should also be included as part of a comprehensive treatment plan.

55 Degrees and Above

  • Surgical intervention is often considered for Cobb angles over 55 degrees.
  • If surgery is not an option, bracing may still be used to help manage the condition.

Unsure if your child requires treatment for their scoliosis?

Please feel free to reach out to us at office@orthotics.co.uk, and a member of our team will respond promptly. Please provide as much detail as you have and any X-rays.

If you would rather book an assessment to see how Childrens orthotics can help. You can schedule directly through our website to receive a 5% discount, or call us at 0330 088 3949 to speak with one of our friendly customer service representatives.

Let us help support your child with expert scoliosis treatment designed to improve their quality of life.

To get in touch or arrange an appointment, you can call us at 0330 088 3949 or email office@orthotics.co.uk.

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