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Multilevel measurement of acetabular version using 3-D CT-generated models: implications for hip preservation surgery
Aimee C Perreira1, John C Hunter, Thaddeus Laird
1Dept of Orthopaedic Surgery, University of California Davis, 4860 Y Street, #3800, Sacramento, CA 95817, USA.
Clinical Orthopaedics and Related Research
|September 28, 2010
Summary
Acetabular retroversion, a hip deformity, involves the entire pelvic segment, not just the acetabulum. This finding aids surgeons in hip osteotomy and recontouring procedures.
Area of Science:
- Orthopedic surgery
- Radiology
- Hip biomechanics
Background:
- Hip osteoarthritis (OA) is linked to acetabular deformities.
- Acetabular retroversion is suspected in femoroacetabular impingement.
- The origin of acetabular retroversion (isolated bone excess vs. pelvic torsion) remains unclear.
Purpose of the Study:
- Develop a 3D model method for measuring acetabular version (AV), independent of patient positioning.
- Determine if acetabular retroversion is localized or involves the entire pelvic segment.
Main Methods:
- Analyzed 50 pelvic CT scans.
- Measured acetabular version (AV) at multiple levels, abduction, and ischial spine position.
- Correlated AV at different levels and with ischial spine position.
Main Results:
- Prevalence of acetabular retroversion was 7%.
- Females exhibited greater AV than males.
- Significant correlations found between AV at different pelvic levels and ischial spine position.
Conclusions:
- Acetabular retroversion affects the entire pelvic segment, including the acetabulum and ischial spine.
- Findings provide surgical targets for acetabular positioning in periacetabular osteotomies and recontouring.
