Healio
Healio
September 01, 2015
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Acetabular anterior overcoverage, retroversion in the anterosuperior acetabulum not more common in women

Recently published data indicated that although women had a greater mean global and focal acetabular anteversion compared with men, the prevalence of focal cephalad retroversion in the 1 o’clock position was not significantly different between men and women.

Researchers retrospectively reviewed CT scans for acetabula morphologic features in 878 patients who had a mean age of 42.6 years and were without pelvis injuries. Records obtained from patient medical records included age, gender, ethnicity and BMI. Using an automated algorithm, researchers identified the acetabular rim, the pelvis’s frontal plane was normalized and version and coverage were calculated.

Rim profiles for both men and women were compared at the 1 o’clock, 2 o’clock and 3 o’clock positions. In addition, researchers calculated the mean global acetabular version for both men and women in all three positions.

Findings showed mean global acetabular version for men and women was 19.1° and 22.2°, respectively. In the 1 o’clock position, the mean acetabular version for men was 15.5° and 18.3° for women. In the 2 o’clock position, it was 21.5° for men and 24.0° for women. In the 3 o’clock position, it was 20.2° for men and 24.3° for women.

The focal 1 o’clock position was the only position with true retroversion, and true global retroversion was not observed. The difference was not significant between genders for the prevalence of true acetabular retroversion in the 1 o’clock position with 4.3% for men and 3%, for women.

Mean acetabular anterior coverage in the 3 o’clock position was 58.6° for men and 56.3° for women; demonstrating the 3 o’clock position had significantly more coverage in men compared with women. In all three positions studied, men had significantly less posterior wall coverage, according to researchers.

“Acetabular retroversion and anterior overcoverage are not more prevalent in women in the anterosuperior acetabulum, where femoroacetabular impingement most commonly occurs,” the researchers wrote.  ‒ by Monica Jaramillo

Disclosures: Tannenbaum reports no relevant financial disclosures. Please see the study for a full list of all other authors’ relevant financial disclosures.

Sources/Disclosures

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Source:

Tannenbaum EP, et al. Arthroscopy.  2015; doi: 10.1016/j.arthro.2015.02.007.