Abstract
We performed a retrospective outcome study on 23 consecutive acetabular reconstructions involving impaction bone grafting in Japanese patients. Two hips had cavitary defects, and 21 hips had combined segmental and cavitary defects. The mid-term follow-up was performed at a mean of 5.5 years postoperatively. The mean Merle d'Aubigné and Postel hip score had improved from 11.5 to 15.7 points at the final follow-up. Two hips showed migration at 30 months after surgery, and one of these was a candidate for re-revision due to symptomatic cup migration. The Kaplan-Meier survival rate of the cup, with loosening and re-operation as the end points, was 91.3 and 95.7% at 5 years, respectively. Acetabular impaction bone grafting is a reproducible technique in which surgeons should strictly follow the recommended technical procedure.
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