sentences:  Instead of enamel, the tooth displays a layer of cementum, orthodentine, and modified orthodentine, creating a soft, easily abraded surface.The teeth of "M. americanum" exhibit extreme hypsodonty, indicative of its gritty, fibrous diet.Their teeth in side view show interlocking V-shaped biting surfaces, though they are nearly square in cross-section and exhibit bilophodonty.