The premolars and molars are bilophodont, each having two distinct lophs (ridges). The premolar is triangular and about half the size of the molars. As in kangaroos, the necks of the lophs are coated in cementum. Unlike in kangaroos, there is no connecting ridge between the lophs. The peaks of these lophs have a thick enamel coating that thins towards the base; this could wear away with use and expose the dentine layer, and beneath that osteodentine. Like the first premolar of other marsupials, the first molar of Diprotodon and wombats is the only tooth that is replaced. D. optatum premolars were highly morphologically variable even within the same individual.
The premolars and molars are bilophodont, each having two distinct lophs (ridges). The premolar is triangular and about half the size of the molars. As in kangaroos, the necks of the lophs are coated in cementum. Unlike in kangaroos, there is no connecting ridge between the lophs. The peaks of these lophs have a thick enamel coating that thins towards the base; this could wear away with use and expose the dentine layer, and beneath that osteodentine Like the first premolar of other marsupials the first molar of Diprotodon and wombats is the only tooth that is replaced. D. optatum premolars were highly morphologically variable even within the same individual.