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Study: Mixed-type FAI may develop with decreased pelvic incidence
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Decreased pelvic incidence may lead to mixed-type femoroacetabular impingement, according to results.
Researchers compared 65 patients with symptomatic hip pain and radiographic signs of femoroacetabular impingement (FAI) with 27 age- and sex-matched control patients. Investigators obtained CT scans of the pelvis, which included the sacral endplate among all patients. Researchers measured alpha angle, acetabular version and pelvic incidence on 2-D CT prior to assigning patients to a control group, cam group, retroverted group or mixed group.
According to post hoc comparisons using Tukey’s honest significant difference tests, pelvic incidence was significantly decreased in the mixed group compared with the control group. However, results showed no statistically significant differences in pelvic incidence between the cam group and the control group, and between the acetabular retroversion group and control group.
Douglas Weinberg
Researchers found definitive calculations of the alpha angle using MRI measurements among FAI groups, but no significant differences for any comparison when CT measurements of the alpha angle were substituted. No significant differences for any comparison were found when acetabular version measurements were taken at 1 o’clock and 2 o’clock, according to results. – by Casey Tingle
Disclosures: Weinberg reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.
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