title: In not only vertebroplasty but also kyphoplasty, the resolution of vertebral deformities depends on vertebral mobility.
abstract: OBJECTIVE
  It has not been clarified whether the postoperative resolution of vertebral deformities achieved by KP are superior to those achieved by VP. We compared the outcomes of KP and VP, taking into account the presence of vertebral mobility, to determine whether the balloon inflation in KP may contribute to postoperative resolution of the vertebral deformities in patients with VCFs.
  
  
  METHODS
  The subjects had 34 vertebral bodies treated by VP, and 43 vertebral bodies treated by KP. In all patients, preoperative dynamic imaging was performed to assess the presence of vertebral mobility. First, the vertebral height restoration and kyphotic change were compared between the VP and KP groups. Then, the patients were further divided into 2 groups on the basis of the presence of vertebral mobility, and they were compared within and between the VP and KP groups in relation to the presence of vertebral mobility.
  
  
  RESULTS
  Overall, no significant differences were observed in either the vertebral height restoration or kyphotic change between the VP and KP groups (P > .20). Preoperative dynamic imaging identified 19 vertebral bodies each with vertebral mobility in the VP (56%) and KP groups (44%) (P = .21). Within the VP and KP groups, the vertebral height restoration and kyphotic changes were significantly better in patients with vertebral mobility than in those without (P < .01). There were no significant differences between the 2 treatment groups after adjustment for the presence of vertebral mobility (P > .30).
  
  
  CONCLUSIONS
  In both the VP and KP groups, the vertebral height restoration and kyphotic change largely depended on the preoperative vertebral mobility. The use of the balloon itself contributed little to resolution of the vertebral deformities.
authors: Department of Neurosurgery, Takeda General Hospital, Fushimi, Kyoto, Japan. neu100@poh.osaka-med.ac.jp
authors: K
authors: K
authors: Yokoyama
authors: M
authors: M
authors: Kawanishi
authors: M
authors: M
authors: Yamada
authors: H
authors: H
authors: Tanaka
authors: Y
authors: Y
authors: Ito
authors: M
authors: M
authors: Hirano
authors: T
authors: T
authors: Kuroiwa
mesh_terms: D000368:Aged; D001843:Bone Cements / Q000009:adverse effects / Q000737:chemistry; D005260:Female; D005547:Foreign Bodies / Q000209:etiology; D050815:Fractures, Compression / Q000601:surgery*; D006801:Humans; D007403:Intervertebral Disc / Q000473:pathology; D058498:Kyphoplasty / Q000379:methods*; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D009068:Movement; D010024:Osteoporosis / Q000150:complications; D010147:Pain Measurement; D013122:Spinal Diseases / Q000150:complications; D016103:Spinal Fractures / Q000601:surgery*; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome; D054854:Vertebroplasty / Q000379:methods*
chemical_list: D001843:Bone Cements
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