Citation, DOI, disclosures and article data
Citation:
Feger J, Knipe H, mariano m, et al. Acetabular version angle. Reference article, Radiopaedia.org (Accessed on 23 Apr 2024) https://doi.org/10.53347/rID-81057
Disclosures:
At the time the article was last revised Henry Knipe had the following disclosures:
- Radiopaedia Events Pty Ltd, Speaker fees (past)
- Integral Diagnostics, Shareholder (ongoing)
- Micro-X Ltd, Shareholder (ongoing)
These were assessed during peer review and were determined to
not be relevant to the changes that were made.
View Henry Knipe's current disclosures
The acetabular version angle or acetabular anteversion angle is a measurement used on cross-sectional imaging especially pelvic CT for the assessment of acetabular morphology.
The acetabular version angle is influenced by pelvic obliquity and pelvic tilt, which might lead to measurement errors if not considered 1,2. It is also influenced by physeal closure and with increasing distance from the acetabular roof 3.
Acetabular version is measured as the angle between a line connecting the anterior acetabular margin with the posterior acetabular margin and the perpendicular to a transverse reference line either through the femoral head centers, the posterior acetabular walls or the respective posterior aspect of the ischial bones 1-3.
Physiologic acetabular anteversion angles in adults have been declared in the 12° to 20° range 5-7, but seem to be more variable 3,8 probably not least because of the dependence of the distance to the acetabular roof 3.
The following mean and standard deviations have been suggested for measurements in a pediatric population (age group 9-18) at the level of the center of the femoral head by a study group 3:
- before physeal closure: 14° ± 4°
- after physeal closure: 19° ± 4°
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1. van Bosse H, Lee D, Henderson E, Sala D, Feldman D. Pelvic Positioning Creates Error in CT Acetabular Measurements. Clin Orthop Relat Res. 2011;469(6):1683-91. doi:10.1007/s11999-011-1827-9 - Pubmed
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2. Lembeck B, Mueller O, Reize P, Wuelker N. Pelvic Tilt Makes Acetabular Cup Navigation Inaccurate. Acta Orthop. 2005;76(4):517-23. doi:10.1080/17453670510041501 - Pubmed
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3. Hingsammer A, Bixby S, Zurakowski D, Yen Y, Kim Y. How Do Acetabular Version and Femoral Head Coverage Change with Skeletal Maturity? Clin Orthop Relat Res. 2015;473(4):1224-33. doi:10.1007/s11999-014-4014-y - Pubmed
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4. Kim W, Hutchinson C, Andrew J, Allen P. The Relationship Between Acetabular Retroversion and Osteoarthritis of the Hip. J Bone Joint Surg Br. 2006;88(6):727-9. doi:10.1302/0301-620X.88B6.17430 - Pubmed
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5. Tönnis D & Heinecke A. Acetabular and Femoral Anteversion: Relationship with Osteoarthritis of the Hip. J Bone Joint Surg Am. 1999;81(12):1747-70. doi:10.2106/00004623-199912000-00014 - Pubmed
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6. Reynolds D, Lucas J, Klaue K. Retroversion of the Acetabulum. A Cause of Hip Pain. J Bone Joint Surg Br. 1999;81(2):281-8. doi:10.1302/0301-620x.81b2.8291 - Pubmed
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7. Direito-Santos B, França G, Nunes J et al. Acetabular Retroversion: Diagnosis and Treatment. EFORT Open Rev. 2018;3(11):595-603. doi:10.1302/2058-5241.3.180015 - Pubmed
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8. Tallroth K & Lepistö J. Computed Tomography Measurement of Acetabular Dimensions: Normal Values for Correction of Dysplasia. Acta Orthop. 2006;77(4):598-602. doi:10.1080/17453670610012665 - Pubmed
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