title: Bousquet dual mobility socket for patient under fifty years old. More than twenty year follow-up of one hundred and thirty one hips.
abstract: The aim of this study was to analyze dual mobility cup survival rate on young patients under 50 years old at more than 20 years of follow up.
  
  
  
  One hundred thirty seven hips with a first generation of dual mobility Bousquet cup (Serf) were included. The mean age at the time of the surgery was 41 years and the mean follow-up was 21.9 years.
  
  
  
  Twenty year follow-up cup survival rate was 77%. No dislocation occurred, 44 hips were revised (including 21 cup aseptic loosenings isolated, 15 Intra Prosthetic Dislocations), seven hips were lost to follow-up, 11 patients died, and 75 hips were still in situ.
  
  
  
  First generation dual mobility cup survival on young patient was comparable with literature results. The main complications, cup aseptic loosening and intra prosthetic dislocation, were wear-related. With improvements of the defects of first generation dual mobility, we might expect an even better survival rate with contemporary DM cups.
authors.affiliation: University Hospital of Saint Etienne, Avenue Albert Raimond, Saint Etienne, France.
authors.forename: Remi
authors.initials: R
authors.lastname: Philippot
authors.affiliation: University Hospital of Saint Etienne, Avenue Albert Raimond, Saint Etienne, France. thomas.neri@chu-st-etienne.fr.
authors.forename: Thomas
authors.identifier: 0000-0001-8793-1956
authors.initials: T
authors.lastname: Neri
authors.affiliation: University Hospital of Saint Etienne, Avenue Albert Raimond, Saint Etienne, France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Boyer
authors.affiliation: University Hospital of Dijon, Dijon, France.
authors.forename: Brice
authors.initials: B
authors.lastname: Viard
authors.affiliation: University Hospital of Saint Etienne, Avenue Albert Raimond, Saint Etienne, France.
authors.forename: Frederic
authors.initials: F
authors.lastname: Farizon
mesh_terms: D000293:Adolescent; D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000601:surgery*; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D012189:Retrospective Studies; D015996:Survival Rate; D055815:Young Adult
keywords: Cement less; Dislocation; Dual mobility; Instability; Total hip arthroplasty; Young patients