Figure 5

Classification of talocalcaneal coalitions based on 3D reconstruction of computer tomography by Rozansky et al. [[25]] . Type 1 – linear: fibrocartilaginous linear coalition parallel to the subtalar joint; Type 2 – linear with posterior hook: fibrocartilaginous coalition linear anteriorly, which curves into a posterior hook overlapping the sustentaculum tali medial and dorsal; Type 3 – shingled: coalition with an orientation that sloped down in an overlapping fashion, with the talar portion shingled over the calcaneal; Type 4 – complete osseous: complete osseous coalition of the medial facet; Type 5 – posterior: small, peripheral posterior coalition.