title: Primary total hip arthroplasty with dual mobility socket to prevent dislocation: a 22-year follow-up of 240 hips.
abstract: OBJECTIVE
  The longest follow-up dual mobility series from inventor Gilles Bousquet focussing on implant survival and the incidence of dislocation.
  
  
  METHODS
  This was a retrospective study from 1985 to 1990, on 240 hips using a PF® modular femoral stem and a dual mobility Novae® tripodal socket (SERF).
  
  
  RESULTS
  The 22-year follow-up global survival rate was 74%. No dislocation occurred, 41 hips were revised, including ten retentive failures (RF), 12 hips were lost to follow-up, 87 patients (99 hips) died without revision, and 90 hips were still in situ.
  
  
  CONCLUSIONS
  The dual mobility socket global survival rate is comparable to similar series. The 0% dislocation rate demonstrates the success of dual mobility with regard to implant stability. The main issues were cup fixation, which might be improved by the use of macrostructures and HA coating, and osteolytic lesions, caused by polyethylene wear. Traditionally suitable for patients older than 60 years, dual mobility might be extended for use in patients over 50.
authors.affiliation: Chirurgie Orthopédique et Traumatologie, CHU St Etienne, St Etienne, France. bertrand.boyer@chu-st-etienne.fr
authors.forename: Bertrand
authors.initials: B
authors.lastname: Boyer
authors.forename: Rémi
authors.initials: R
authors.lastname: Philippot
authors.forename: Jean
authors.initials: J
authors.lastname: Geringer
authors.forename: Frédéric
authors.initials: F
authors.lastname: Farizon
mesh_terms: D000367:Age Factors; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods*; D017760:Bone Malalignment / Q000453:epidemiology / Q000517:prevention & control*; D005260:Female; D005602:France / Q000453:epidemiology; D006617:Hip Dislocation / Q000453:epidemiology / Q000517:prevention & control*; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology; D011474:Prosthesis Design; D011475:Prosthesis Failure / Q000209:etiology*; D012189:Retrospective Studies; D015996:Survival Rate