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.
Keywords: press-fit, acetabular, EBRA, migration, medial, lucency
To access this article, please choose from the options below
The Conflict of Interest statement associated with this article can be found at doi:10.1016/j.arth.2011.10.024.
PII: S0883-5403(11)00573-0
doi:10.1016/j.arth.2011.10.024
© 2011 Elsevier Inc. All rights reserved.
