title: Radiographic outcomes over time after endoscopic anterior scoliosis correction: a prospective series of 106 patients.
abstract: METHODS
  A prospective, consecutive series of 106 patients receiving endoscopic anterior scoliosis correction.
  
  
  OBJECTIVE
  To analyze changes in radiographic parameters and rib hump in the 2 years after surgery.
  
  
  BACKGROUND
  Endoscopic anterior scoliosis correction is a level sparing approach and therefore, it is important to assess the amount of decompensation which occurs after surgery.
  
  
  METHODS
  All patients received a single anterior rod and vertebral body screws using a standard compression technique. Cleared disc spaces were packed with either mulched femoral head allograft or rib head/iliac crest autograft. Radiographic parameters (major, instrumented, minor Cobb, T5-T12 kyphosis) and rib hump were measured at 2, 6, 12, and 24 months after surgery. Paired t tests and Wilcoxon signed ranks tests were used to assess the statistical significant of changes between adjacent time intervals.
  
  
  RESULTS
  Mean loss of major curve correction from 2 to 24 months after surgery was 4 degrees. Mean loss of rib hump correction was 1.4 degrees. Mean sagittal kyphosis increased from 27 degrees at 2 months to 30.6 degrees at 24 months. Rod fractures and screw-related complications resulted in several degrees less correction than patients without complications, but overall there was no clinically significant decompensation after complications.
  
  
  CONCLUSIONS
  There are small changes in deformity measures after endoscopic anterior scoliosis surgery, which are statistically significant but not clinically significant.
authors.affiliation: Queensland University of Technology and Mater Health Services Brisbane Ltd, Queensland, Australia.
authors.forename: Douglas
authors.initials: D
authors.lastname: Hay
authors.forename: Maree T
authors.initials: MT
authors.lastname: Izatt
authors.forename: Clayton J
authors.initials: CJ
authors.lastname: Adam
authors.forename: Robert D
authors.initials: RD
authors.lastname: Labrom
authors.forename: Geoffrey N
authors.initials: GN
authors.lastname: Askin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001863:Bone Screws; D016025:Bone Transplantation / Q000379:methods; D002648:Child; D004724:Endoscopy; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies; D011859:Radiography; D012272:Ribs / Q000000981:diagnostic imaging / Q000503:physiopathology; D012399:Rotation; D012600:Scoliosis / Q000601:surgery*; D013123:Spinal Fusion / Q000295:instrumentation / Q000379:methods*; D013131:Spine / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult