Biomechanical evaluation of the anterior drawer test: the contribution of the lateral ankle ligaments.

The contributions of the lateral ankle ligaments to resisting anterior-posterior displacement of the talus were evaluated in eight unembalmed cadaveric ankles. While holding the distal tibia fixed, loads of 150 N were applied to the talus in the anterior and posterior directions in the neutral, dorsiflexed, and plantarflexed positions using an hydraulic test system. Tests were performed on the intact specimens then after sequential sectioning of the lateral ligaments of the ankle. Under strictly anteroposterior loading and without an axial (weight-bearing) load applied, no single ligament could be isolated as having a dominant stabilizing function.