Three-dimensional anatomical characterization of the sustentaculum tali in asymptomatic adults: a computed tomography-based morphometric analysis

This study establishes normative 3D-CT anatomical parameters of the sustentaculum tali in healthy individuals (<i>n</i> = 104), revealing significant gender-based differences in dimensions and posterior talar gap distance L (all <i>P</i> < 0.001). Critical gender-specific diagnostic thresholds for dislocation were defined: <i>L</i> > 7.25 mm (males) and >6.49 mm (females). Combined with screw trajectory angles (α/β/γ) and sustentaculum dimensions (length/width/height), these data provide an evidence-based framework for preoperative planning, urgent reduction indication, and precision screw placement in calcaneal fracture management.