title: [A method to avoid the fixator failure by using pedicle screw combined vertebroplasty for spine fractures].
abstract: OBJECTIVE
  To study a new implant material (carbonated hydroxyapatite, CHA) united pedicle screw to cure spine fracture.
  
  
  METHODS
  Thirty-two cases of spine compressed fracture were used with pedicle screw fixator and vertebroplasty. Before operation, patients' vertebral body were compressed (46 + 21)% (20% approximately 70%) on average. In operation, broken vertebral body was reposition through pedicle screw technique, then used self-made syringe to inject CHA into anterior and central column of broken vertebral body through pedicle. And all of patients were not given any bone-graft.
  
  
  RESULTS
  In 6 - 26 months followed-up, no immunologic rejection was found about hydroxyapatite, and no any broken of the screws and shafts was found, no loosing and other complications either. All the patients could move in 3 - 5 days after operation. The height of the broken vertebral body were reduced 97% compared with pre-operation. And CHA in vertebral body was degraded gradually, and at the same time it was replace by new bone in vertebral body. After operation, VAS score was 61 +/- 32, and there was significant difference compared with pre-operation.
  
  
  CONCLUSIONS
  The pedicle screw fixation united vertebroplasty is an efficient way to prevent the failure of the treatment of spine fracture.
authors.affiliation: Department of Orthopaedics, Beijing People's Liberation Army Hospital, Beijing 100853, China. taoshphy@126.com
authors.forename: Sheng
authors.initials: S
authors.lastname: Tao
authors.forename: Ke-ya
authors.initials: KY
authors.lastname: Mao
authors.forename: Bao-wei
authors.initials: BW
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Yu-tian
authors.initials: YT
authors.lastname: Liang
authors.forename: Pei-fu
authors.initials: PF
authors.lastname: Tang
authors.forename: Hui-xian
authors.initials: HX
authors.lastname: Wang
mesh_terms: D000328:Adult; D001863:Bone Screws; D018786:Bone Substitutes / Q000627:therapeutic use; D017886:Durapatite / Q000627:therapeutic use; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal / Q000295:instrumentation / Q000379:methods*; D050815:Fractures, Compression / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D016103:Spinal Fractures / Q000601:surgery*; D054854:Vertebroplasty / Q000379:methods*
chemical_list: D018786:Bone Substitutes; D017886:Durapatite