title: Locking mechanism failure in the Harris-Galante porous acetabular component associated with recurrent hip dislocation.
abstract: In this review of longitudinal studies of the Harris-Galante porous acetabular component, 20% of all revisions were caused by failure of the polyethylene liner locking mechanism. We report 2 cases of locking mechanism failure in the Harris-Galante porous acetabular component presenting with recurrent dislocation. Broken tines from the acetabular locking mechanism were found embedded into the polyethylene liners in both cases. In a 79-year-old woman with recurrent dislocation, the polyethylene liner and femoral head were replaced, and the acetabular component was revised. In a 74-year-old man with chronic recurrent dislocation, the polyethylene liner and femoral head were replaced, but the acetabular component was preserved. Appropriate treatment for locking mechanism failure with a well-fixed acetabular component depends on many factors, and further long-term data are needed.
authors.affiliation: Department of Orthopedics, University of Utah, Salt Lake City, Utah 84132, USA. Chris.peters@hsc.utah.edu
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Peters
authors.forename: Charles L
authors.initials: CL
authors.lastname: Sullivan
mesh_terms: D000077:Acetabulum; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006617:Hip Dislocation / Q000000981:diagnostic imaging*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D011095:Polyethylenes; D016062:Porosity; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012008:Recurrence
chemical_list: D011095:Polyethylenes