J Korean Soc Spine Surg.  2007 Mar;14(1):57-66. 10.4184/jkss.2007.14.1.57.

The Classification of Idiopathic Scoliosis

  • 1Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul, Korea. choonki@snu.ac.kr


There are many classifications for idiopathic scoliosis but none of these is perfect. In the treatment of idiopathic scoliosis, it is essential to understand the characteristics of each classification system and exploit their individual advantages.


Idiopathic scoliosis; Classification

MeSH Terms



  • Fig. 1. (A) The stable zone of Harrington, defined by parallel lines drawn through the lumbosacral facets. the vertebral bodies within the lines are in the stable zone. (B) stable vertebra

  • Fig. 2. King and Moe Classsification : Curve patterns

  • Fig. 3. King type 1: Lumbar curve is larger than thoracic curve on standing radiography and more rigid than thoracic curve. Fusion of both curves was done.

  • Fig. 4. King type 2: The rigid thoracic curve, from T5 to T10, is more rigid and larger than lumbar curve. Selective thoracic fusion was done from T4 to T11.

  • Fig. 5. King type 3: The right thoracic curve, from T6 to T12, measures 50 degrees. the lumbar curve is compensatory curve and doesn’ t cross the midline. Selective thoracic fusion was done to the neutral vertebra(L1).

  • Fig. 6. King type 5: The first thoracic vertebra is tilted into the upper thoracic curve(called a positive T1 tilt) and the first rib is ele-vated on the convexity of the thoracic curve. Only lower thoracic curve was fused

  • Fig. 7. Double thoracic curves: The proximal thoracic curve is larger and more rigid than the lower thoracic curve, but in Lenke classification, the proximal thoracic curve cannot be the main curve.

  • Fig. 8. T1 tilt does not correlate well with left shoulder elevation, but correlates with left first rib elevation and trapezius prominence. T1 tilt and left first rib elevation should be considered as the indication of the extension of fusion to upper curve.

  • Fig. 9. Rib-vertebral angle difference

Cited by  1 articles

The relation between idiopathic scoliosis and the frontal and lateral facial form
Tae-Hwan Kim, Joo-Hwan Kim, Yae-Jin Kim, Il-Sik Cho, Yong-Kyu Lim, Dong-Yul Lee
Korean J Orthod. 2014;44(5):254-262.    doi: 10.4041/kjod.2014.44.5.254.


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