Three-dimensional morphological measurements of calcaneus. (A, B) Location of measurement points was illustrated. A = highest point of posterior facet; B = bottom of the posterior facet at lateral surface intersecting anterior process of calcaneus; C = highest point of calcaneocuboid joint; D = lowest point of calcaneocuboid joint; E = most posterior point of calcaneal tuberosity; F = highest point on the superior edge of calcaneal tuberosity. (C, D) The calcaneal morphological parameters in 3D space were shown. GE = length of calcaneal axis; AH = height of posterior facet; AB = length of posterior facet; BC = length of anterior process; CD = height of anterior process; ∠ABC = Gissane’s angle; 180°-∠CAF = Böhler’s angle. The posterior and middle facets were shown as blue surfaces.