title: Sacroiliac joint syndrome 10 years after lumbar arthroplasty: the importance of spinopelvic alignment.
abstract: BACKGROUND
  Sagittal balance is an independent predictor of outcomes in spinal care and several authors focused their attention on the lumbar lordosis restoration as the key point to prevent secondary sacroiliac joint dysfunction (SIJD) after fusion. On the other hand, lumbar disc arthroplasty allows preservation of motion avoiding increased stress on the spinopelvic junction and preventing iatrogenic sagittal imbalance.
  
  
  METHODS
  We analyze the incidence of a secondary SIJD and the spinopelvic alignment on a series of 31 consecutive lumbar disc prosthesis with a 10-year follow-up.
  
  
  RESULTS
  Sagittal balance assessment showed no significant variation of preoperative spinopelvic parameters. Four patients (12 %) presented a symptomatic SIJD. Only two of them required a percutaneous SIJ fixation. Both of them presented a fused L5-S1 prosthesis.
  
  
  CONCLUSIONS
  The low rate of SIJD 10 years after lumbar arthroplasty might be explained by the preservation of the spinopelvic balance.
authors.affiliation: Spinal Unit, Department of Orthopaedic Surgery, Cantonal Hospital Fribourg, Chemin des Pensionnats 2, 1708, Fribourg, Switzerland, ciarpa@hotmail.com.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Ciarpaglini
authors.forename: Philippe
authors.initials: P
authors.lastname: Otten
authors.forename: Patrick
authors.initials: P
authors.lastname: Sutter
authors.forename: Vo Quoc
authors.initials: VQ
authors.lastname: Duy
authors.forename: Emanuel
authors.initials: E
authors.lastname: Gautier
authors.forename: Gianluca
authors.initials: G
authors.lastname: Maestretti
mesh_terms: D000328:Adult; D019643:Arthroplasty, Replacement / Q000009:adverse effects*; D017760:Bone Malalignment / Q000517:prevention & control; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000209:etiology / Q000503:physiopathology*; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010384:Pelvic Bones; D004856:Postural Balance; D012446:Sacroiliac Joint / Q000503:physiopathology; D012447:Sacrum / Q000601:surgery; D055815:Young Adult