title: High failure rate of a constrained acetabular liner in revision total hip arthroplasty.
abstract: Fifty-five consecutive revision total hip arthroplasties (THAs) in 51 patients in which a constrained acetabular liner was used (Duraloc Constrained Liner, DePuy, Warsaw, Ind) were reviewed. In these revisions, 41 constrained liners were placed for recurrent instability and 14 for inadequate stability at the time of revision THA. The mean age of the cohort was 62 years, and 38 of the hips were in female patients (69%). At a minimum of 2 years, 9 of the 55 hips (16%) dislocated. Of these 9 dislocations, 8 occurred in patients who had undergone revision to a constrained liner for recurrent instability without femoral or acetabular component revision. Revision THA for recurrent instability by placing a constrained liner without optimizing other aspects of the reconstruction leads to a high rate of recurrent failure.
authors.affiliation: Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.
authors.forename: Craig J
authors.initials: CJ
authors.lastname: Della Valle
authors.forename: Dennis
authors.initials: D
authors.lastname: Chang
authors.forename: Scott
authors.initials: S
authors.lastname: Sporer
authors.forename: Richard A
authors.initials: RA
authors.lastname: Berger
authors.forename: Aaron G
authors.initials: AG
authors.lastname: Rosenberg
authors.forename: Wayne G
authors.initials: WG
authors.lastname: Paprosky
mesh_terms: D000077:Acetabulum; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006621:Hip Joint / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D007593:Joint Instability / Q000453:epidemiology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation