Knee Flexion Restriction Due to Trochlear Dysplasia

Trochlear dysplasia involves a shallow or malformed femoral groove that fails to guide the patella properly. To diagnose this, a clinician must order a specialized X-ray, specifically a sunrise or merchant view, to evaluate the sulcus angle. An angle greater than 145 degrees typically confirms a shallow groove, which prevents the patella from engaging correctly during knee flexion.

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