AANA19 Hip Access Pass-Lateral Osseous Labral Coverage is Normal in Hips with Acetabular Dysplasia-Dr. Matthew J. Kraeutler, M.D.

Lateral Osseous Labral Coverage is Normal in Hips with Acetabular Dysplasia-Dr. Matthew J. Kraeutler, M.D.

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Video Summary

This study investigated hip instability in patients with acetabular dysplasia, focusing on compensatory labral hypertrophy that maintains femoral head coverage despite decreased bony support. Researchers introduced a combined lateral center edge angle, measured via MRI, incorporating both bone and labral structures. Analyzing 341 patients (386 hips), they found that while bony coverage varied, the combined osteolabral coverage remained consistent across groups, including those with dysplasia. Linear regression showed a narrow range of combined angle values regardless of the degree of bony dysplasia. In conclusion, labral hypertrophy compensates for deficient bone coverage, preserving overall hip joint stability.

Keywords

hip instability

acetabular dysplasia

labral hypertrophy

combined lateral center edge angle

femoral head coverage