What clinical test is used to evaluate a posterolateral corner injury?

The dial test is specifically designed to assess injuries to the posterolateral corner of the knee, as well as potential injuries to lateral collateral ligament and posterior cruciate ligament involvement. This test focuses on measuring the amount of external rotation of the tibia in relation to the femur while the knee is positioned in both 30 degrees and 90 degrees of flexion.

When testing for posterolateral corner injuries, the difference in rotation between these two positions can indicate an injury. If the tibia rotates significantly more in the 30-degree position compared to the 90-degree position, this suggests a posterolateral corner injury.

This clinical test is vital for a comprehensive knee examination, especially for athletes who may sustain multi-ligamentous injuries or those involved in high-contact sports. The dial test is therefore a key assessment tool for identifying and managing knee injuries in sports medicine.