title: Analysis of migration of press-fit porous-coated acetabular components with medial lucencies using Ein-Bild-Roentegen-Analyse.
abstract: A total of 136 patients who underwent total hip arthroplasty (154 hips) with press-fit acetabular components were evaluated for the presence of medial radiographic lucencies. Thirty patients (22.1%) demonstrated radiolucencies greater than 1 mm in zone 2 on initial postoperative films. Ein-Bild-Roentegen-Analyse (EBRA) was used to evaluate component migration over a 5-year follow-up period. Migration, measured by EBRA, was not observed during the first 6 months when the radiolucencies were noted to disappear. After 2 years, the mean total migration was 0.8 mm, and at 5 years, it was 1.6 mm. Our results indicate that disappearance of a medial radiolucency seen on early postoperative radiographs is not associated with component migration, which supports the concept that the medial radiolucency fills in with bone or represents bony remodeling around a stable implant.
authors.affiliation: University of California, San Francisco, CA, USA.
authors.forename: Cameron
authors.initials: C
authors.lastname: Sadeghi
authors.forename: Anthony G
authors.initials: AG
authors.lastname: Gibson
authors.forename: Michael D
authors.initials: MD
authors.lastname: Ries
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000601:surgery; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods; D020099:Coated Materials, Biocompatible; D003287:Contrast Media; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery; D016062:Porosity; D011184:Postoperative Period; D011474:Prosthesis Design; D011475:Prosthesis Failure / Q000639:trends*; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D020099:Coated Materials, Biocompatible; D003287:Contrast Media