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Is acetabular morphology related to trochlear dysplasia?
R Rajakulasingam1, J Murphy1, C E Bache2
1Department of Musculoskeletal Radiology, Royal Orthopaedic Hospital, Birmingham, UK.
Journal of Clinical Orthopaedics and Trauma
|January 30, 2020
Summary
Trochlear dysplasia, a knee condition, is significantly linked to increased anterior acetabular coverage. This finding highlights a potential correlation between knee and hip joint development.
Area of Science:
- Orthopedic surgery
- Radiology
- Developmental anatomy
Background:
- Trochlear dysplasia is a common cause of anterior knee pain and instability.
- Acetabular coverage is crucial for hip joint stability and function.
Purpose of the Study:
- To investigate the relationship between trochlear dysplasia and acetabular coverage.
- To determine if specific grades of trochlear dysplasia correlate with altered acetabular morphology.
Main Methods:
- Retrospective analysis of 109 CT scans from young adult knee clinic patients.
- Bilateral measurement of anterior acetabular sector angle (AASA) and posterior acetabular sector angle (PASA) on axial CT images.
- Grading of trochlear dysplasia using the Dejour classification (A-D).
Main Results:
- Dejour types A, B, and D trochlear dysplasia showed a statistically significant association with an increased anterior acetabular sector angle (AASA).
- P-value of 0.0011 indicates a strong statistical significance for this association.
Conclusions:
- A significant relationship exists between trochlear dysplasia and anterior acetabular coverage, specifically indicated by AASA.
- These findings suggest a potential developmental link between the knee's trochlear morphology and the hip's acetabular coverage.
