A Comparison on the Sagittal Alignment in Chinese AIS girls by EOS Radiography Undergoing a Posterior Spinal Fusion Surgery: A Pre- and Post-Surgical Comparison
Refereed conference paper presented and published in conference proceedings


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AbstractIntroduction: Adolescent idiopathic scoliosis (AIS) is the most common pediatric spinal deformity, affecting 3% of adolescents. Patients with progressive curve often needs surgical correction. The purpose of surgery is to reduce scoliotic curvature, however, it often neglects the importance on sagittal alignment. An undesirable sagittal alignment may lead to long term complications such as pain and aggravated spinal degeneration. In this study, we aimed to evaluate the sagittal spinopelvic alignment in AIS subjects before and after surgery.

Methodology: Total 17 pre-op AIS girls with a primary right thoracic curve (Risser sign ≥4) and 17 healthy girls were recruited. All subjects underwent EOS biplanar radiographs at baseline with radiological parameters comparisons. Thus, AIS subjects underwent two additional follow-up radiological comparisons at: 1) 1- month post-op; 2) ≥3months follow-up.

Results and Analysis: There was significant difference on radiological parameters between pre-op AIS and controls. Cobb angle was significantly reduced after surgery, while lumbar lordosis, pelvic incidence and sacral slope significantly improved at post-op stage. But these parameters were reverted to their initial status at follow-up stage. In addition, cervical lordois, thoracic kyphosis and pelvic obliquity remained significantly different from controls even after surgery.

Discussion and Conclusion: Our results reaffirmed the presence of significant reversed cervical lordosis, thoracic hypokyphosis, lumbar hyperlordosis in AIS patients. Despite an excellent improvement in coronal profile, most of sagittal spinopelvic parameters remained significantly different from controls. Although most of the sagittal parameters did show initial improvement after surgery, some of them would eventually revert to profile similar at pre-op stage and should be aware in surgical correction.
All Author(s) ListKH Yeung, ZS Hu, GCW Man, TP Lam, BKW Ng, JCY Cheng, WCW Chu
Name of ConferenceHong Kong Orthopaedic Association 38th Annual Congress 2018 (HKOA 2018)
Start Date of Conference03/11/2018
End Date of Conference04/11/2018
Place of ConferenceHong Kong
Country/Region of ConferenceHong Kong
Proceedings TitleThe Proceedings of Hong Kong Orthopaedic Association 38th Annual Congress 2018 (HKOA 2018)
Year2018
Month11
Place of PublicationHong Kong
Pages77 - 77
LanguagesEnglish-United Kingdom

Last updated on 2019-24-04 at 12:31