title: Does surgery for Scheuermann kyphosis influence sagittal spinopelvic parameters?
abstract: OBJECTIVE
  To analyze changes in sagittal spinopelvic parameters (SSPs) after surgical treatment of Scheuermann's Kyphosis (SK).
  
  
  METHODS
  We analyzed 20 patients affected by SK and subjected to posterior correction of the kyphosis by facetectomy, Ponte osteotomy, fusion and multilevel instrumentation with pedicle screw system. Four spinal and three pelvic parameters were measured: sagittal vertical axis (SVA), thoracic kyphosis (TK), thoracolumbar kyphosis, lumbar lordosis (LL), pelvic incidence (PI), sacral slope (SS) and pelvic tilt (PT). Analysis of changes in postprocedural SSPs compared to preoperative values was performed.
  
  
  RESULTS
  TK passed from 78.6° preoperatively to 45.8° (p = 0.003). LL passed from 74.5° preoperatively to 53.5° (p = 0.01). No significant changes occurred in SVA, SS, PT and PI compared to preoperative values.
  
  
  CONCLUSIONS
  We confirm the positive effect of surgery by Ponte osteotomy and posterior spinal fusion on TK and LL in patients with SK. In our experience, pelvic parameters did not change after surgery.
authors.affiliation: Department of General Orthopaedics, Department Rizzoli Sicilia, Istituto Ortopedico Rizzoli di Bologna, University of Bologna, Via Giulio Cesare Pupilli 1, 40136, Bologna, Italy. cesare.faldini@ior.it.
authors.forename: Cesare
authors.initials: C
authors.lastname: Faldini
authors.affiliation: Department of General Orthopaedics, Department Rizzoli Sicilia, Istituto Ortopedico Rizzoli di Bologna, University of Bologna, Via Giulio Cesare Pupilli 1, 40136, Bologna, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Traina
authors.affiliation: Istituto Ortopedico Rizzoli di Bologna, University of Bologna, Bologna, Italy.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Perna
authors.affiliation: Istituto Ortopedico Rizzoli di Bologna, University of Bologna, Bologna, Italy.
authors.forename: Raffaele
authors.initials: R
authors.lastname: Borghi
authors.affiliation: Department of Spinal Deformity Surgery, Istituto Ortopedico Rizzoli di Bologna, Bologna, Italy.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Martikos
authors.affiliation: Department of Spinal Deformity Surgery, Istituto Ortopedico Rizzoli di Bologna, Bologna, Italy.
authors.forename: Tiziana
authors.initials: T
authors.lastname: Greggi
mesh_terms: D000293:Adolescent; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D010027:Osteotomy; D065289:Pedicle Screws; D010384:Pelvic Bones / Q000503:physiopathology; D012189:Retrospective Studies; D012447:Sacrum; D012544:Scheuermann Disease / Q000503:physiopathology / Q000601:surgery*; D013123:Spinal Fusion / Q000295:instrumentation / Q000379:methods; D013131:Spine / Q000503:physiopathology; D016896:Treatment Outcome; D055815:Young Adult
keywords: Kyphosis; Posterior fusion; Sagittal balance; Scheuermann; Spinopelvic parameters