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See Latest ArticlesRadiographic and patient factors associated with pre-radiographic osteoarthritis in hip dysplasia
Journal of Bone and Joint Surgery, 05/06/09
Jessel RH et al. – Study reports that osteoarthritis (OA) is associated with increasing age and the severity of dysplasia, as demonstrated both by the Wiberg lateral center-edge angle and the Lequesne anterior center-edge angle. Additionally, a labral tear was identified as being a risk factor for OA.
Methods- Aim was to investigate the anatomic and demographic factors associated with the early onset of OA in dysplastic hips
- Delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) index was used as a marker of the disease
- 96 symptomatic dysplastic hips in 74 pts were assessed with standard radiographs and a dGEMRIC scan
- The lateral center-edge angle of Wiberg, the acetabular index of Tönnis, and the break in the Shenton line were measured on a standing anteroposterior radiograph
- Anterior undercoverage was assessed by measuring the anterior center-edge angle on a Lequesne false-profile view
- A labral tear was considered as present when contrast agent was seen through the entire thickness of the labrum on magnetic resonance arthrography
- OA was defined as a dGEMRIC value of <390 msec
- Mean dGEMRIC index (and standard deviation) for this cohort was lower than that of a morphologically normal hip
- Univariate analysis: anterior center-edge angle, the joint space width, and the presence of a labral tear were associated with OA
- Multivariate analysis: age, the anterior center-edge angle, and the presence of a labral tear as independent factors associated with OA
- In another model age, the lateral center-edge angle, and the presence of a labral tear were identified as independent factors associated with OA
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