Computed Tomography evaluation of axial vertebral derotation in endoscopic anterior instrumentation for scoliosis

Cordell-Smith, James A., Adam, Clayton J., Izatt, Maree T., Labrom, Robert D., & Askin, Geoffrey N. (2008) Computed Tomography evaluation of axial vertebral derotation in endoscopic anterior instrumentation for scoliosis. In Williamson, Owen (Ed.) Annual Scientific Meeting of the Spine Society of Australia, 18-20 April 2008, Adelaide, Australia.


Open instrumented anterior spinal fusion for adolescent idiopathic scoliosis (AIS) is a proven technique for vertebral derotation that, compared with posterior spinal fusion procedures, invariably requires fewer distal fusion levels to be performed. With the advent and evolution of endoscopic anterior instrumentation, further clinical benefits are possible such as reduced pulmonary morbidity, improved cosmesis and less postoperative pain. However, quantitative data on the radiological improvement of vertebral rotation using this method is limited. The aim of this study was to measure preoperative and postoperative axial vertebral rotational deformity at the apex of the curve in endoscopic anterior instrumented scoliosis surgery patients using computed tomography (CT), and assess the relevance of these findings to clinically measured chest wall rib hump deformity correction. We believe this is the first quantitative CT study to confirm that endoscopic anterior instrumented fusion for AIS substantially improves the axial vertebral body rotational deformity at the apex of the curve. The margin of correction of 43% compares more favourably than the historically published figure of 24% in a cohort of patients with all-hook-rod constructs used for posterior spinal fusion (3). Patient age and gender demographics, curve magnitude and curve types in the historical study were similar to our group, and an identical CT protocol for measuring vertebral derotation was utilised. In addition, the CT measurements obtained significantly correlated to the clinical outcome of rib hump deformity correction.

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ID Code: 13868
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: computed tomography, idiopathic scoliosis, endoscopic anterior instrumentation, anterior surgery
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomechanical Engineering (090302)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2008 (please consult author)
Deposited On: 24 Jun 2008 00:00
Last Modified: 05 May 2017 01:34

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