title: [Posterior dynamic stabilization as an alternative for dorso-ventral fusion in spinal stenosis with degenerative instability].
abstract: OBJECTIVE
  Our retrospective study analyzed the outcome of patients with degenerative lumbar instability with spinal stenosis, who underwent decompression surgery with dorsoventral fusion (Group I) and decompression surgery with posterior dynamic stabilization (Group II).
  
  
  METHODS
  For 10 patients in each group intra- and postoperative data were obtained and the functional outcome was evaluated with the "Oswestry Low Back Pain Disability Questionnaire" (OQ) and the "Short Form 36 Health Survey Questionnaire" (SF-36). The average follow up was 14.4 months in Group I, 15.2 months in Group II.
  
  
  RESULTS
  In Group I the OQ averaged postoperatively 32 points (preoperatively 46 points), the "Physical Component Summary" (PCS) of SF-36 averaged 34 points (preoperatively 24 points), the "Mental Component Summary" (MCS) averaged 43 points (preoperatively 36). In Group II the values at follow up were as follows: OQ 33 points (preoperatively 54), PCS 34 points (preoperatively 28) and MCS 46 points (preoperatively 36). The average hospitalization was 28.4 days in Group I, 19.3 days in Group II and the average operation time was 218 minutes in Group I, 163 minutes in Group II.
  
  
  CONCLUSIONS
  When compared the functional outcome, the dynamic stabilization seems to be a promising alternative to fusion in patients with degenerative lumbar instability with spinal stenosis.
authors.affiliation: Orthopädische Klinik mit Querschnittgelähmtenzentrum der Universität Ulm, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Cakir
authors.forename: B
authors.initials: B
authors.lastname: Ulmar
authors.forename: H
authors.initials: H
authors.lastname: Koepp
authors.forename: K
authors.initials: K
authors.lastname: Huch
authors.forename: W
authors.initials: W
authors.lastname: Puhl
authors.forename: M
authors.initials: M
authors.lastname: Richter
mesh_terms: D000368:Aged; D019299:Decompression, Surgical / Q000379:methods*; D005260:Female; D006801:Humans; D016268:Internal Fixators; D007405:Intervertebral Disc Displacement / Q000150:complications* / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D020127:Recovery of Function; D012189:Retrospective Studies; D013123:Spinal Fusion / Q000295:instrumentation* / Q000379:methods*; D013130:Spinal Stenosis / Q000150:complications* / Q000601:surgery*; D016896:Treatment Outcome