title: [Retrospective study of combined application of interspinous process fixation system and rigid fixation system for degenerative lumbar diseases].
abstract: OBJECTIVE
  To assess the efficacy and safety of combined application of interspinous process fixation system and rigid fixation system for degenerative lumbar diseases.
  
  
  METHODS
  From September 2007 to September 2008, 16 cases with degenerative lumbar diseases were treated with combined application of interspinous process fixation system and rigid fixation system. The clinical results were assessed by VAS of pain of lumbar and lower limbs, lumbar JOA score and Prolo functional score. The radiological results including implant position (interspinous process, pedicle screws and plates), spinous process fracture, segmental range of motion (the non-fusion fixation segment, and the intermediate segments between fused and non-fused segments) which were assessed by lumbar static and dynamic X rays.
  
  
  RESULTS
  All 16 cases obtained an average follow-up of 17.6 months. At final follow up, lumbar VAS, lower limbers VAS, lumbar JOA score and Prolo functional score were significant improved than those of pre-operation (lumbar VAS: 1.9 +/- 1.4 vs. 4.5 +/- 3.1; lower limbs VAS: 1.7 +/- 1.2 vs. 6.3 +/- 2.9; lumbar JOA score: 22.8 +/- 3.3 vs. 12.5 +/- 4.7; Prolo functional score: 8.3 +/- 1.2 vs. 4.0 +/- 2.3). Range of motion of the non-fusion fixation segment was (9.8 +/- 4.2) degrees and that of the intermediate segments between fused and non-fused segments was (13.2 +/- 3.5) degrees .
  
  
  CONCLUSIONS
  Combined application of interspinous process fixation system and rigid fixation system for degenerative lumbar diseases provides a new idea to avoid the multi-segment fusion fixation and pertinent potential problems. Short-term clinical results are successful.
authors.affiliation: Department of Orthopedics Surgery, Peking University First Hospital, Beijing 100034, China.
authors.forename: Hao-lin
authors.initials: HL
authors.lastname: Sun
authors.forename: Chun-de
authors.initials: CD
authors.lastname: Li
authors.forename: Xian-yi
authors.initials: XY
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.forename: Zheng-rong
authors.initials: ZR
authors.lastname: Yu
authors.forename: Jing-rong
authors.initials: JR
authors.lastname: Lin
authors.forename: Xiao-dong
authors.initials: XD
authors.lastname: Yi
authors.forename: Hong
authors.initials: H
authors.lastname: Liu
authors.forename: Hai-lin
authors.initials: HL
authors.lastname: Lu
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016268:Internal Fixators; D008159:Lumbar Vertebrae / Q000601:surgery; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013122:Spinal Diseases / Q000601:surgery*; D013123:Spinal Fusion / Q000379:methods*; D016896:Treatment Outcome