Transverse plane pelvic rotation in spinal deformity: measurement reliablity and relationship to diagnosis and deformity

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dc.contributor.author Gum, Jeff
dc.date.accessioned 2006-07-05T21:13:19Z
dc.date.available 2006-07-05T21:13:19Z
dc.date.issued 2006-07-05T21:13:19Z
dc.identifier.uri http://hdl.handle.net/2271/163
dc.description Clinical Studies II Room G026 Dykes 1:30 PM Abstract 125 en
dc.description.abstract Purpose: Transverse plane pelvic rotation has been implicated in the pathogenesis of adolescent idiopathic scoliosis (AIS). In vitro, transverse plane pelvic rotation can be determined by a ratio of the radiographic coronal plane hemi-pelvis widths. The purposes of this study are to determine the reliability of this technique on standing 36 inch radiographs and the relationship of transverse plane pelvic rotation to curve direction and location. Methods: Pre-operative posterior-anterior radiographs of 305 consecutively operated patients were reviewed and those with full pelvis exposure, 197 (65%) studied; including patients with AIS 167/241, congenital scoliosis 15/33, isthmic spondylolisthesis 7/18, and Scheuermann’s 8/13. AIS patients' curves were grouped by Lenke classification. Intra- and inter-rater reliability (ICC) was calculated and significance of rotation was done using One-sample Student’s t-test. Results: Intra- and inter-rater reliabilities were 0.97 and 0.88. Scheuermann’s and spondylolisthesis groups had no transverse plane pelvic rotation. Lenke type 1 AIS curves (n=68) had clockwise pelvic rotation, (p< 0.0001), the same as their thoracic curve. Congenital thoracic curves (n=15) also had clockwise pelvic rotation (p=0.028). Lenke type 2, 3, 4, 5, or 6 curves showed no correlation between their direction of pelvic rotation and scoliosis curve rotation. Conclusion: This radiographic measurement technique of transverse plane pelvic rotation is reliable. Clockwise pelvic rotation correlates significantly with clockwise thoracic rotation/scoliosis for both adolescent idiopathic and congenital scoliosis. This supports the hypothesis that transverse plane pelvic rotation may be involved in the pathogenesis of thoracic scoliosis, but not other patterns, at least as currently classified. en
dc.description.sponsorship Burton, Douglas Orthopedic Surgery en
dc.format.extent 2998272 bytes
dc.format.mimetype application/vnd.ms-powerpoint
dc.language.iso en_US en
dc.subject spinal deformity en
dc.subject adolescent idiopathic scoliosis en
dc.subject pelvic rotation en
dc.title Transverse plane pelvic rotation in spinal deformity: measurement reliablity and relationship to diagnosis and deformity en
dc.type Presentation en

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