title: Migration of the trabecular metal monoblock acetabular cup system.
abstract: Fifty-one primary total hip arthroplasties were performed using Trabecular Metal Monoblock Acetabular Cup System (Zimmer Inc, Warsaw, IN). In a 2-year prospective study, its behavior was closely monitored by clinical, radiologic, and component migration assessment by Ein-Bild-Röntgen-Analyse method. There were no complications. The mean Harris hip score was improved from 41 to 95. A polar gap at the postoperative radiograph was noted at 25% of the arthroplasties, most of which subsequently filled with bone within 6 months. The mean total absolute migration was 0.67 mm. The implant showed excellent early clinical and radiographic behavior. The 2-year migration rate study, as index of long-term survival and success, showed very good early implant stability and, in all cases except one, superior to the available studies for similar design acetabular cups.
authors.affiliation: Department of Orthopedics, First IKA Hospital, Athens, Greece.
authors.forename: Athanasios T
authors.initials: AT
authors.lastname: Kostakos
authors.forename: Georgios A
authors.initials: GA
authors.lastname: Macheras
authors.forename: Constantinos E
authors.initials: CE
authors.lastname: Frangakis
authors.forename: Kosmas S
authors.initials: KS
authors.lastname: Stafilas
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Baltas
authors.forename: Theodoros A
authors.initials: TA
authors.lastname: Xenakis
mesh_terms: D000077:Acetabulum; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005548:Foreign-Body Migration / Q000000981:diagnostic imaging*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery; D011475:Prosthesis Failure; D011859:Radiography
chemical_list: D008670:Metals