This study examines cross-sections of molar crowns in a diverse modern human sample to
quantify variation in enamel thickness and enamel–dentine junction (EDJ) shape.
Histological sections were generated from molars sectioned buccolingually across mesial
cusps. Enamel cap area, dentine area, EDJ length, and bi-cervical diameter were measured
on micrographs using a digitizing tablet. Nine landmarks along the EDJ were defined, and X
and Y coordinates were digitized in order to quantify EDJ shape. Upper molars show greater …