title: Long-term effects of the Chêneau brace on coronal and sagittal alignment in adolescent idiopathic scoliosis.
abstract: OBJECTIVE
  The aim of the present study was to retrospectively evaluate progressive correction of coronal and sagittal alignment and pelvic parameters in patients treated with a Chêneau brace.
  
  
  METHODS
  Thirty-two patients with adolescent idiopathic scoliosis (AIS) were assessed before initiation of bracing treatment and at the final follow-up. Each patient underwent radiological examinations, and coronal, sagittal, and pelvic parameters were measured.
  
  
  RESULTS
  No statistically significant modification of the Cobb angle was noted. The pelvic incidence remained unchanged in 59% of the cases and increased in 28% of the cases. The sacral slope decreased in 34% of the cases but remained unchanged in 50%. Thoracic kyphosis and lumbar lordosis were significantly decreased, whereas the sagittal vertical axis was significantly increased from a mean of -44.0 to -30.2 mm (p = 0.02). The mean pelvic tilt increased significantly from 4.5° to 8.3° (p = 0.002).
  
  
  CONCLUSIONS
  The Chêneau brace can be useful for preventing curvature progression in patients with AIS. However, the results of this study reveal high variability in the effect of brace treatment on sagittal and pelvic alignment. Treatment with the Chêneau brace may also influence sagittal global balance.
authors.affiliation: Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Ming-Qiao
authors.initials: MQ
authors.lastname: Fang
authors.affiliation: Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Chong
authors.initials: C
authors.lastname: Wang
authors.affiliation: Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Guang-Heng
authors.initials: GH
authors.lastname: Xiang
authors.affiliation: Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Lou
authors.affiliation: Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Nai-Feng
authors.initials: NF
authors.lastname: Tian
authors.affiliation: Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Hua-Zi
authors.initials: HZ
authors.lastname: Xu
mesh_terms: D000293:Adolescent; D001915:Braces; D005260:Female; D006801:Humans; D008297:Male; D011859:Radiography; D012189:Retrospective Studies; D012600:Scoliosis / Q000000981:diagnostic imaging / Q000628:therapy*; D016896:Treatment Outcome
keywords: AIS = adolescent idiopathic scoliosis; Chêneau brace; LL = lumbar lordosis; PI = pelvic incidence; PT = pelvic tilt; SS = sacral slope; SVA = sagittal vertical axis; TK = thoracic kyphosis; adolescent idiopathic scoliosis; deformity; progressive correction; sagittal alignment