Labral morphologic characteristics in patients with symptomatic acetabular dysplasia

Area of Science:

• Orthopedic surgery
• Hip biomechanics
• Radiology

Background:

• Symptomatic acetabular dysplasia is associated with labral morphologic changes, but these characteristics require further definition.
• Understanding labral variants is crucial for diagnosing hip instability.

Purpose of the Study:

• To characterize labral morphology in patients with symptomatic acetabular dysplasia.
• To investigate the relationship between labral variants, dysplasia severity, and symptom duration.

Main Methods:

• A cross-sectional study involving 972 hips from 942 patients undergoing periacetabular osteotomy for acetabular dysplasia.
• Prospective data collection on demographics, clinical presentation, radiographic data, and intraoperative findings, with retrospective review.
• Intraoperative labral visualization and grading of morphologic status (hypertrophic, normal, hypoplastic, ossified).

Main Results:

• Labral hypertrophy was observed in 50% of visualized hips; 64% had labral tears, mostly degenerative.
• Labral hypertrophy correlated with decreased lateral center-edge angle, anterior center-edge angle, and increased acetabular inclination.
• No association was found between labral hypertrophy and symptom chronicity.

Conclusions:

• Labral abnormalities are common in symptomatic acetabular dysplasia.
• Labral hypertrophy is not a universal finding and its absence does not rule out dysplasia.
• Labral hypertrophy should not be solely relied upon as a diagnostic criterion for hip instability.