Classification
Type I:
- S-shaped curve in which both thoracic curve lumbar curve cross midline
- Lumbar curve larger than thoracic curve on standing roentgenogram
- Flexibility index a negative value (thoracic curve < lumbar curve on standing roentgenogram, but more flexible on side-bending)
Type II:
- S-shaped curve in which thoracic curve and lumbar curve cross midline
- Thoracic curve < lumbar curve
- Flexibility index < 0
Type III
- Thoracic curve in which lumbar curve does not cross midline (so-called overhang)
Type IV
- Long thoracic curve in which L5 is centered over sacrum but L4 tilts into long thoracic curve
Type V
- Double thoracic curve with T1 tilted into convexity of upper curve; upper curve structural on side-bending
Explanation
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Figures
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Reference(s)
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