Articular Stability

Articular Stability Tests:

1. Navicular Drop Test: The patient is standing with the tested foot in a non-WBing position.  The patient is then asked to assume 50% weightbearing on the affected foot.  A drop greater than 10mm suggests medial longitudinal arch collapse and excessive pronation.

2. Talar Rock: The patient is sidelying with their hip and knee flexed.  The clinician then places both hands around the ankle below the medial and lateral malleoli.  They then apply a distraction force of the foot upward or downward and a “clunk” should be felt at the end of movement.

Despite these examinations being widely accepted for the diagnosis of articular instability, we were unable to locate research assessing the validity of these examinations.

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