title: [Utility of nickel-titanium shape memory alloys of vertebral body reduction fixator with assisted distraction bar].
abstract: OBJECTIVE
  To test the nickel-titanium (Ni-Ti) shape memory alloys of vertebral body reduction fixator with assisted distraction bar for the treatment of traumatic and osteoporotic vertebral body fracture.
  
  
  METHODS
  A Ni-Ti shape memory alloys of vertebral body reduction fixator with assisted distraction bar was implanted into the compressed fracture specimens through vertebral pedicle with the radiographic monitoring to reduce the collapsed endplate as well as distract the compressed vertebral fracture. Radiographic film and computed tomographic reconstruction technique were employed to evaluate the effects of reduction and distraction. A biomechanic test machine was used to measure the fatigue and the stability of deformation of fixation segments.
  
  
  RESULTS
  Relying on the effect of temperature shape memory, such an assembly could basically reduce the collapsed endplate as well as distract the compressed vertebral fracture. And when unsatisfied results of reduction and distraction occurred, its super flexibility could provide additional distraction strength.
  
  
  CONCLUSIONS
  A Ni-Ti shape memory alloys of vertebral body reduction fixator with assisted distraction bar may provide effective endplate reduction, restore the vertebral height and the immediate biomechanic spinal stability. So the above assembly is indicated for the treatment of traumatic and osteoporotic vertebral body fracture.
authors.affiliation: Department of Orthopedics, Zhabei District Central Hospital, Shanghai 200070, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Man
authors.forename: Yue-huan
authors.initials: YH
authors.lastname: Zheng
authors.forename: Peng
authors.initials: P
authors.lastname: Cao
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.forename: Tao
authors.initials: T
authors.lastname: Zheng
authors.forename: Chang-hui
authors.initials: CH
authors.lastname: Sun
authors.forename: Jiong
authors.initials: J
authors.lastname: Lu
mesh_terms: D000497:Alloys; D005593:Fracture Fixation, Internal; D006801:Humans; D008422:Materials Testing; D009532:Nickel; D019736:Prostheses and Implants; D013123:Spinal Fusion / Q000295:instrumentation*; D014025:Titanium
chemical_list: D000497:Alloys; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium