Quantitation of Three-Dimensional Deformity of Idiopathic Scoliosis

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Abstract
Three-dimensional deformities in vertebrae of patients with idiopathic scoliosis were analyzed quantitatively using three-dimensional computed tomography. To evaluate the deformities, the vertebral lordosis and scoliosis were defined clearly. An average lordosis of 7.9° and an average scoliosis of 6.8° were calculated in 40 vertebrae near the top of the thoracic curve in 10 subjects with adolescent idiopathie scoliosis. Lordosis is characteristic of idiopathic scoliosis. Three-dimensional deformities in scoliotic patients cannot be represented precisely using the Cobb angle. A new technique for quantifying the three-dimensional deformities must be established.

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