• Hao Hou, Dong Guo, Haonan Liu, Yanzhong Luo, Ziming Yao, Lei Feng, Jun Cao, Rongxuan Gao, and Xuejun Zhang.
• Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China, 100045.
• Spine. 2024 Jun 6.

Study Design/SettingThis retrospective study analyzed bracing outcomes in AIS patients, focusing on curve pattern changes and brace efficacy.ObjectiveTo analyze the effectiveness of the Chêneau brace across different curve patterns and to evaluate the tendencies in curve evolution during treatment.Summary Of Background DataAdolescent idiopathic scoliosis (AIS) presents diverse curve patterns, each responding differently to bracing. Understanding these variations is crucial for optimizing treatment strategies.MethodsThe study included 177 AIS patients treated with Chêneau orthoses, categorized based on curve patterns as per the main curve and modified Lenke (mLenke) classifications. We compared patients according to curve patterns and assessed changes in curve magnitude and pattern before and after treatment.ResultsOver an average follow-up of 28.1±10.7 months, the primary curve magnitude decreased from 28.8±6.6° to 25.9±10.5°. Significant reductions were observed in mLenke V and VI patients (P<0.05). Patients with main lumbar curves showed better initial in-brace correction and curve control compared with those with main thoracic curves (P<0.05). In single-curve patterns, binary logistic regression indicated that mLenke V patients demonstrated higher rates of curve control compared with mLenke I patients (P<0.05). No significant differences were found in double-curve patterns between mLenke III and VI (P>0.05). At the final follow-up, thoracolumbar/lumbar curves improved significantly in mLenke III and VI patients (P<0.05), while thoracic curves did not (P>0.05). Furthermore, at the last follow-up, the proportions of mLenke I, II, and IV increased, while mLenke III, V, and VI decreased.ConclusionsBracing outcomes were more favorable in patients with main lumbar curves than those with main thoracic curves. However, no significant differences were found in patients with double-curve patterns. Thoracic curves exhibited a higher progression risk compared with thoracolumbar/lumbar curves within the same curve pattern. During bracing, a tendency for primary curves to shift proximally was noted.Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.

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