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Journal of Bone and Joint Surgery - British Volume, Vol 88-B, Issue 3,
304-309.
doi: 10.1302/0301-620X.88B3.16940 Copyright © 2006 by British Editorial Society of Bone and Joint Surgery Radiological evaluation of the metal-bone interface of a porous tantalum monoblock acetabular componentG. A. Macheras, MD, Consultant and Director1; P. J. Papagelopoulos, MD, DSc, Assistant Professor and Consultant2; K. Kateros, MD, Consultant3; A. T. Kostakos, MD, Consultant1; D. Baltas, MD, Consultant1; and T. S. Karachalios, MD, Associate Professor and Consultant4
1 Department of Orthopaedics, First IKA Hospital Athens, 1 Zaimi Street, 15127, Athens, Greece. Correspondence should be sent to Dr G. A. Macheras; e-mail: gmachera{at}otenet.gr
Between January 1998 and December 1998, 82 consecutive patients (86 hips) underwent total hip arthroplasty using a trabecular metal monoblock acetabular component. All patients had a clinical and radiological follow-up evaluation at six, 12 and 24 weeks, 12 months, and then annually thereafter. On the initial post-operative radiograph 25 hips had a gap between the outer surface of the component and the acetabular host bed which ranged from 1 to 5 mm. All patients were followed up clinically and radiologically for a mean of 7.3 years (7 to 7.5). The 25 hips with the 1 to 5 mm gaps were studied for component migration at two years using the Einzel-Bild-Roentgen-Analyse (EBRA) digital measurement method. At 24 weeks all the post-operative gaps were filled with bone and no acetabular component had migrated. The radiographic outcome of all 86 components showed no radiolucent lines and no evidence of lysis. No acetabular implant was revised. There were no dislocations or other complications. The bridging of the interface gaps (up to 5 mm) by the trabecular metal monoblock acetabular component indicates the strong osteoconductive, and possibly osteoinductive, properties of trabecular metal. This article has been cited by other articles:
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