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Vertebral Axial Asymmetry in Adolescent Idiopathic Scoliosis.
Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV). Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Spinal Surgery.
Linköping University, Center for Medical Image Science and Visualization (CMIV). Sectra, Linköping, Sweden.ORCID iD: 0000-0003-0908-9470
Linköping University, Department of Medical and Health Sciences, Division of Radiological Sciences. Linköping University, Faculty of Medicine and Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV). Region Östergötland, Center for Diagnostics, Department of Radiology in Linköping.ORCID iD: 0000-0002-4111-1693
Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV). Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Spinal Surgery. Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Orthopaedics in Linköping.
2018 (English)In: Spine Deformity, ISSN 2212-1358, Vol. 6, no 2, p. 112-120.e1Article in journal (Refereed) Published
Abstract [en]

Study Design

Retrospective study.

Objectives

To investigate parameters of axial vertebral deformation in patients with scoliosis compared to a control group, and to determine whether these parameters correlated with the severity of spine curvature, measured as the Cobb angle.

Summary of Background Data

Adolescent idiopathic scoliosis (AIS) is the most common type of spinal deformity. Many studies have investigated vertebral deformation, in terms of wedging and pedicle deformations, but few studies have investigated actual structural changes within vertebrae.

Methods

This study included 20 patients with AIS (Lenke 1–3, mean age: 15.6 years, range: 11–20). We compared preoperative low-dose computed tomography(CT) examinations of patients with AIS to those of a control group matched for age and sex. The control individuals had no spinal deformity, but they were admitted to the emergency department for trauma CTs. We measured the Cobb angles and the axial vertebral rotation (AVR), axial vertebral bodyasymmetry (AVBA), and frontal vertebral body rotation (FVBR) for the superior end, inferior end, and apical vertebrae, with in-house–developed software. Correlations between entities were investigated with the Pearson correlation test.

Results

The average Cobb angles were 49.3° and 1.3° for the scoliotic and control groups, respectively. The patient and control groups showed significant differences in the AVRs of all three vertebra levels (p < .01), the AVBAs of the superior end and apical vertebrae (p < .008), and the FVBR of the apical vertebra (p = .011). Correlations were only found between the AVBA and FVBR in the superior end vertebra (r = 0.728, p < .001) and in the apical vertebra (r = 0.713, p < .001).

Conclusions

Compared with controls, patients with scoliosis showed clear morphologic differences in the midaxial plane vertebrae. Differences in AVR, AVBA, and FVBR were most pronounced at the apical vertebra. The FVBR provided valuable additional information about the internal rotation and deformation of vertebrae.

Level of Evidence

Level III.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 6, no 2, p. 112-120.e1
Keyword [en]
Scoliosis; Morphology; Three-dimensional; Vertebral rotation; Low-dose CT
National Category
Orthopaedics
Identifiers
URN: urn:nbn:se:liu:diva-145864DOI: 10.1016/j.jspd.2017.09.001PubMedID: 29413732Scopus ID: 2-s2.0-85032338953OAI: oai:DiVA.org:liu-145864DiVA, id: diva2:1191845
Available from: 2018-03-20 Created: 2018-03-20 Last updated: 2018-03-27Bibliographically approved

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Vavruch, LudvigForsberg, DanielDahlström, NilsTropp, Hans

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Division of Surgery, Orthopedics and OncologyFaculty of Medicine and Health SciencesCenter for Medical Image Science and Visualization (CMIV)Department of Spinal SurgeryDivision of Radiological SciencesDepartment of Radiology in LinköpingDepartment of Orthopaedics in Linköping
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