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Surface topography assessment of body shape after surgical correction in adolescent idiopathic scoliosis

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Abstract

Hypothesis

Body surface topography (ST) improvements are associated with surgical correction in adolescent idiopathic scoliosis (AIS) and correlate with radiographic imaging.

Design

Prospective observational study.

Introduction

Patients undergoing correction of AIS are most affected by body image. Radiographs have been the standard assessment tool but do not assess body shape features. ST, a validated, radiation-free assessment tool, directly represents the patient’s deformity. We set out to assess ST improvements associated with surgical correction in AIS.

Methods

Twenty-three consecutive operative AIS patients were enrolled and had radiographs and posterior ST obtained pre- and postoperatively (PO). ST changes were compared using paired t test, and correlations of ST with radiograph measurements were evaluated by linear regression.

Results

Mean age at surgery was 15.0 ± 2 years, 82.6% female with mean follow-up of 1.0 year. Major Cobb angle improved from 56.91° ± 15.57° to 13.70° ± 4.89°. ST scoliosis angle corrected from 41.43° ± 11.52° to 11.78° ± 7.84° (p < .0001). Trunk length increased from 401.22 ± 32.43 to 422.30 ± 25.77 mm (Δ21.08 mm; p = .0004). Pelvic obliquity (waist asymmetry) trended toward improvement (6.0 ± 4.3 vs. 5.3 ± 7.1 mm; p = .06). Surface rotation was corrected from 17.35 ± 6.73 to 11.8 ± 4.12 mm (p < .0001), highly correlated with clinical trunk rotation (T p = .002 and TL p = .02). ST highly correlated with radiographic parameters. Sagittal balance correlated with improved function (p = .02).

Conclusion

ST, a radiation-free body shape assessment tool, improved with surgical correction of AIS and was highly correlated with radiographic outcomes.

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Funding

No research funding was received.

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Authors and Affiliations

  1. Orthopaedic Surgery, Mount Sinai Hospital, 1468 Madison Ave, New York, NY, 10029, USA

    Baron S. Lonner, Andrea Castillo, Gabrielle Kassin & Yuan Ren

Authors
  1. Baron S. Lonner
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  2. Andrea Castillo
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  3. Gabrielle Kassin
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  4. Yuan Ren
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Corresponding author

Correspondence to Baron S. Lonner.

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Conflict of interest

BSL (Grants from Setting Scoliosis Straight Foundation; personal fees from DePuy Synthes Spine, K2M, Paradigm Spine, Spine Search, and Ethicon; nonfinancial support from Spine Deformity journal; grants from John and Marcella Fox Fund Grant and Orthopaedic Research and Education Foundation; personal fees from Zimmer Biomet, Apifix, and Unyq, outside the submitted work), AC (none), GK (none), YR (none).

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This study was reviewed and approved by Mount Sinai Hospital Institutional Review Board.

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Lonner, B.S., Castillo, A., Kassin, G. et al. Surface topography assessment of body shape after surgical correction in adolescent idiopathic scoliosis. Spine Deform 8, 213–220 (2020). https://doi.org/10.1007/s43390-020-00041-4

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  • DOI: https://doi.org/10.1007/s43390-020-00041-4

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