title: Dual mobility cup: dislocation rate and survivorship at ten years of follow-up.
abstract: OBJECTIVE
  The dual mobility cup introduced in France by Gilles Bousquet has been used in total hip replacement in high-risk patients. This device acts as a large ball implant and significantly reduces the risk of dislocation following hip arthroplasty. Published French literature has focused on low rates of dislocation and long-term follow-up similar to the low-friction arthroplasty.
  
  
  METHODS
  We retrospectively reviewed a continuous series of 105 cases of dual mobility cup Quattro (Groupe Lépine, Genay, France) implanted from 2000 to 2002. Selection of the patients requiring a primary hip replacement depended on risk criteria such as age, hip disease and activity score. The dual mobility cup was associated with a modular cemented femoral component and a 22.2-mm stainless steel head.
  
  
  RESULTS
  One dislocation occurred one month after the index surgery requiring no revision surgery. According to the Kaplan-Meier method, survival probability was 95.0% (95% confidence interval 81.5-98.8) at ten years of follow-up.
  
  
  CONCLUSIONS
  Based on clinical outcome and patient assessment we conclude that the dual mobility cup is a reliable option to decrease dislocation risk without increasing polyethylene wear.
authors.affiliation: Clinique des Cèdres, 21 rue Albert Londres, 38432, Echirolles, France, jean-louis.prudhon@wanadoo.fr.
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Prudhon
authors.forename: André
authors.initials: A
authors.lastname: Ferreira
authors.forename: Régis
authors.initials: R
authors.lastname: Verdier
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D005260:Female; D005500:Follow-Up Studies; D005602:France; D006617:Hip Dislocation / Q000453:epidemiology* / Q000517:prevention & control; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D015995:Prevalence; D011474:Prosthesis Design; D012189:Retrospective Studies; D012307:Risk Factors; D016896:Treatment Outcome
references.citation: J Bone Joint Surg Am. 1982 Dec;64(9):1295-306
references.pmid: 7142237
references.citation: Int Orthop. 2011 Feb;35(2):185-8
references.pmid: 21249358
references.citation: J Bone Joint Surg Am. 1998 Jan;80(1):70-5
references.pmid: 9469311
references.citation: Orthop Traumatol Surg Res. 2012 May;98(3):296-300
references.pmid: 22463868
references.citation: Rev Chir Orthop Reparatrice Appar Mot. 2004 May;90(3):249-55
references.pmid: 15211274
references.citation: Clin Orthop Relat Res. 2008 Feb;466(2):332-9
references.pmid: 18196414
references.citation: J Arthroplasty. 2002 Apr;17(3):282-8
references.pmid: 11938502
references.citation: J Bone Joint Surg Am. 1954 Jun;36-A(3):451-75
references.pmid: 13163078
references.citation: Int Orthop. 2011 Feb;35(2):225-30
references.pmid: 21184223
references.citation: J Arthroplasty. 2007 Sep;22(6):849-58
references.pmid: 17826276
references.citation: J Arthroplasty. 1992 Jun;7(2):149-55
references.pmid: 1613521
references.citation: Hip Int. 2011 Nov-Dec;21(6):713-7
references.pmid: 22117262
references.citation: J Arthroplasty. 1999 Sep;14(6):662-8
references.pmid: 10512436
references.citation: J Bone Joint Surg Br. 2007 Aug;89(8):1015-8
references.pmid: 17785737
references.citation: Int Orthop. 2012 Dec;36(12):2411-8
references.pmid: 23073926
references.citation: J Arthroplasty. 1997 Apr;12(3):256-66
references.pmid: 9113539
references.citation: J Bone Joint Surg Am. 1985 Jul;67(6):832-41
references.pmid: 4019530
references.citation: J Bone Joint Surg Am. 2009 Jan;91(1):128-33
references.pmid: 19122087
references.citation: J Arthroplasty. 2013 Sep;28(8):1415-20
references.pmid: 23602233
references.citation: J Bone Joint Surg Br. 1981;63-B(2):214-8
references.pmid: 7217144
references.citation: J Arthroplasty. 1995 Oct;10(5):609-14
references.pmid: 9273371
references.citation: J Arthroplasty. 2008 Sep;23(6):867-72
references.pmid: 18534522