A finite element analysis of the optimal longitudinal screw trajectory for Sanders II and Sanders III calcaneal fractures fixed with percutaneous screws

In the treatment of Sanders II and Sanders III calcaneal fractures with percutaneous screw fixation technique, the lateral longitudinal screw should be fixed from the calcaneal tubercle to the anterior process of the calcaneus, and the medial longitudinal screw should be fixed from the calcaneal tubercle along the medial wall to the calcaneal sustentaculum tali. This configuration is associated with optimal biomechanical stability.