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Use of the Explant Acetabular Cup Removal System to remove well-fixed cementless acetabular components was associated with less bone loss compared with removal using Aufranc gouges, according to results of this study.
Of 623 patients who underwent revision total hip arthroplasty (THA) between 2002 and 2013, researchers identified 47 patients (51 hips) who underwent revision of well-fixed cementless acetabular components for any reason except infection. Researchers divided patients into two groups based on the method of acetabular component removal, with 27 acetabular components removed with the Explant Acetabular Cup Removal System (Zimmer) and 24 acetabular components removed with Aufranc gouges.
Muyibat A. Adelani
Researchers measured bone loss by the difference between the initial acetabular component outer diameter and the final reamer outer diameter; the difference between the initial acetabular component outer diameter and the new acetabular component outer diameter; and the use of impaction bone grafting.
Results showed a median difference of 5 mm between the initial acetabular component outer diameter and the diameter of the final reamer in the Aufranc group vs. 3 mm in the Explant group. Researchers found a median change of 6 mm in the acetabular component outer diameter in the Aufranc group vs. 4 mm in the Explant group.
According to results, all hips were reconstructed with standard hemispherical or elliptical acetabular components, with 63% of hips in the Aufranc group and 56% of hips in the Explant group undergoing reconstruction with elliptical acetabular components. At the time of acetabular reconstruction, researchers noted hips in the Aufranc group were more likely to have bone grafting compared with the Explant group. – by Casey Tingle
Disclosures: Adelani reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.
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