ArticleInternational orthopaedics2026
Residual acetabular roof obliquity is associated with long-term joint preservation after transposition osteotomy of the acetabulum.
Article in International orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Orthopaedics' golden rule of time : Everything takes longer-including expecting it to.International orthopaedics · 2026Article
- Japanese Orthopaedic Association and Societe Internationale de Chirugie Orthopedique et Tramatologie: Celebrating one hundred years of friendship and scientific exchange.International orthopaedics · 2026Article
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Authors and funding
10 authors.
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Abstract
purposeTo evaluate whether residual post-operative acetabular roof obliquity is associated with long-term joint preservation after transposition osteotomy of the acetabulum for hip dysplasia.
methodsThis retrospective study included 52 hips with pre-operative Tönnis grade 0 or 1 osteoarthritis and complete electronic radiographic datasets after transposition osteotomy of the acetabulum performed between 1996 and 2005. Conversion to total hip arthroplasty was the primary endpoint. Because only 11 conversions occurred, associations were evaluated using Kaplan-Meier analysis and univariable Cox regression. A 20-year receiver operating characteristic analysis and secondary analyses using a composite structural-failure endpoint and available patient-reported outcomes were exploratory.
resultsEleven hips underwent total hip arthroplasty. Overall joint survival was 98.1% at ten years and 78.5% at 20 years. Higher post-operative acetabular roof obliquity was associated with conversion in univariable Cox regression (hazard ratio 1.10 per degree, 95% confidence interval 1.03 to 1.18; p = 0.005). The 20-year receiver operating characteristic analysis included 38 hips and showed moderate discrimination (area under the curve 0.73, 95% confidence interval 0.48 to 0.94). The internally derived 6.1-degree threshold separated 20-year survival (92.4% versus 45.7%; log-rank p < 0.001), but was not externally validated.
conclusionIn this selected transposition osteotomy cohort, residual post-operative acetabular roof obliquity showed an unadjusted association with long-term total hip arthroplasty conversion. The data-derived threshold should be regarded as exploratory and requires external validation.
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