title: Predictive risk factors for refracture after percutaneous vertebroplasty.
abstract: OBJECTIVE
  To identify risk factors for developing a vertebral refracture after percutaneous vertebroplasty.
  
  
  METHODS
  A retrospective analysis of 60 patients who had undergone percutaneous vertebroplasty between January 2008 and April 2010 was conducted. All patients were observed for a 1 year follow-up period, and fracture was defined when it was both clinically reported and radiographically confirmed. Twenty-seven patients with a refractured vertebra and 33 patients without a refracture were included. Of the 60 patients, 20 presented with a refracture from a cemented vertebra, whereas the remaining 40 patients did not. Clinical, imaging and procedure-related factors for each group were analyzed by the Fisher's exact, chi-square, and the Mann-Whitney U-tests.
  
  
  RESULTS
  Local kyphotic angle and sagittal index were significant as a result of researching various risk factors related to vertebral refracture (p<0.001, p<0.001, respectively) and refracture from a cemented vertebra itself (p=0.004, p<0.001, respectively). Other factors were not significant.
  
  
  CONCLUSIONS
  Patients who had a high preoperative local kyphotic angle and a high sagittal index required a close follow-up and attention.
authors.affiliation: Department of Rehabilitation Medicine, Sun General Hospital, Daejeon 301-725, Korea.
authors.forename: Sang-Kuk
authors.initials: SK
authors.lastname: Kang
authors.forename: Chan Woo
authors.initials: CW
authors.lastname: Lee
authors.forename: Noh Kyoung
authors.initials: NK
authors.lastname: Park
authors.forename: Tae-Wook
authors.initials: TW
authors.lastname: Kang
authors.forename: Jeong-Wook
authors.initials: JW
authors.lastname: Lim
authors.forename: Ki Yong
authors.initials: KY
authors.lastname: Cha
authors.forename: Jung Hwan
authors.initials: JH
authors.lastname: Kim