ArticleActa orthopaedica2025
Factors associated with dislocation after total hip arthroplasties performed for nontraumatic osteonecrosis of the femoral head: a multicenter cohort study of 5,983 hips.
Article in Acta orthopaedica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Risk Factors and Preventive Strategies for Dislocation Following Primary Total Hip Arthroplasty: A Large Single-Surgeon Cohort Study.Journal of clinical medicine · 2026Article
- Timing of first-time dislocation varied by head size after total hip arthroplasty for nontraumatic osteonecrosis.International orthopaedics · 2026Article
- Influence of radial clearance on Tresca stress in AlScientific reports · 2025Article
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6 authors.
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Abstract
background and purposeNontraumatic osteonecrosis of the femoral head (ONFH) patients are at a higher dislocation risk after primary total hip arthroplasties (THAs) than osteoarthrosis patients. It has not been clear how large prosthetic heads should be to reduce dislocation. A nationwide multicenter follow-up cohort study of THAs performed for ONFH aimed to evaluate risk factors associated with dislocation and whether larger head size could reduce the dislocation risk.
methodsA multivariable logistic regression model analyzed factors associated with dislocation in 5,983 THAs performed for ONFH between 1996 and 2022 with a median of 7.1 (0.5-27)-year follow-up. Patient age at surgery was 52 years and BMI was 22.9, as medians. A posterior approach was employed in 59%. The head diameter was 22 mm in 4%, 26 mm in 15%, 28 mm in 24%, 32 mm in 36%, and ≥ 36 mm in 21%.
results288 THAs (4.8%) dislocated. Younger (1st quartile, ≤ 41 years) patient age (odds ratio [OR] 1.45 CI [95% confidence interval] 1.02-2.07 vs. 2nd quartile), higher BMI (OR 1.05, CI 1.02-1.08 per 1), posterior approach (OR 3.33, CI 1.96-5.56 vs. anterior or anterolateral approach, OR 2.27 CI 1.59-3.23 vs. lateral approach), and smaller heads were identified as risk factors. However, ≥ 36-mm heads were not different from 32-mm heads (OR 1.06 CI 0.69-1.63).
conclusionRisk factors associated with dislocation were younger patient age, higher BMI, posterior approach, and smaller heads; however, 32-mm heads were large enough to reduce dislocation.
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