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Computed tomography analysis of acetabular anteversion and abduction
Eric S Stem1, Mary I O'Connor, Mark J Kransdorf
1Department of Orthopedic Surgery, Mayo Clinic, Jacksonville, FL, USA.
Skeletal Radiology
|March 30, 2006
Summary
This study defines normal acetabular abduction and anteversion ranges using CT scans. These findings provide crucial reference values for assessing hip anatomy and component positioning in patients.
Area of Science:
- Radiology
- Orthopaedic Surgery
- Anatomy
Background:
- Accurate assessment of acetabular anatomy is crucial for hip joint evaluation.
- Conventional CT scans are widely used for pelvic imaging.
Purpose of the Study:
- To establish the normal range of acetabular abduction and anteversion.
- To correlate these measurements with pelvic anatomy on conventional CT scans.
Main Methods:
- Retrospective review of 100 pelvic CT scans (58 female, 42 male).
- Measurements of acetabular abduction from AP topogram and anteversion from axial images.
- Patients evaluated for non-orthopaedic pathology.
Main Results:
- Mean acetabular abduction: 39° (SD 4°), range 27°-51°.
- Mean acetabular anteversion: 23° (SD 5°), range 12°-39°.
- Anteversion may be lower in males and increase with age; abduction may decrease with age.
Conclusions:
- Conventional CT scanning accurately defines normal acetabular abduction and anteversion ranges.
- Knowledge of normal values aids in assessing acetabular component position on CT scans.