ArticleOrthopaedic journal of sports medicine2025
Sagittal Orientation of the Acetabulum and Its Relationship to Spinopelvic Alignment: Three-Dimensional Assessment of 3700 Individuals.
Article in Orthopaedic journal of sports medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- The Effect of Age, Sex, and Body Mass Index on Spinopelvic Balance Throughout Childhood and Adolescence: An Automated 3D-Computed Tomography Study of 9,721 Pediatric Patients.Journal of the Pediatric Orthopaedic Society of North America · 2026Article
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9 authors.
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Abstract
Background: The orientation of the acetabulum in the axial and coronal planes is well studied in the pathogenesis of impingement and instability of the hip. In contrast, the sagittal orientation of the acetabulum (SOA) is not well understood. Purpose: To determine (1) the SOA in a large cohort of mature hips and (2) to assess the relationship between the SOA and acetabular version, acetabular center-edge angles (CEAs), and spinopelvic alignment. Study Design: Descriptive laboratory study. Methods: A total of 3695 patients (7390 mature hips) who underwent computed tomography (CT) scans for assessment of nonorthopaedic abdominal and pelvic conditions were studied. An automated measurement software was utilized to reconstruct 3-dimensional models from CT scans and to measure the SOA, functional SOA (not neutralizing pelvic position on sagittal plane), acetabular version, as well as acetabular CEAs and spinopelvic alignment, including the pelvic tilt (PT), sacral slope (SS), and pelvic incidence (PI). Results: The SOA was on average (± SD) 19.6°± 7.5°. The functional SOA (not neutralizing pelvic position on sagittal plane) was on average (± SD) 20.5°± 5.7°. The functional SOA had a statistically significant but negligible correlation with PI ( Conclusion: The acetabulum is on average 19.5° cephalically oriented in the sagittal plane in asymptomatic individuals. The SOA correlates with acetabular version and cannot be presumed based on spinopelvic alignment. Clinical Relevance: The assessment of the SOA may aid in the diagnosis of hip impingement and instability, allowing a more precise correction of the acetabulum in hip arthroscopy and osteotomies.
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