Denomination of root canals and pulp horns for maxillary cheek teeth (top) and mandibular cheek teeth (bottom), adapted from Du Toit et al. (2008) []. The occlusal surface is illustrated by dentine (cream), cement (light grey) and enamel (dark grey). Root contours are schematically displayed adjacent to the occlusal surfaces. Positions of pulp horns are indicated with Arabic numerals (1 to 8). Positions of root canals are indicated with Roman numerals (I to IV).