Post-operative changes in acetabular cartilage mechanics. (a) Peak contact stress significantly decreased overall, and in the lateral, anterior, and superior regions. (b) Average contact stress was significantly reduced overall, and in the lateral, anterior, and posterior regions; average contact stress increased medially. (c) Percent contact area significantly increased overall, and in the medial and superior regions. Bars indicate standard error. P values are listed and * indicates P ≤ 0.05.