The four types of mammalian teeth are the incisors, the canines, the molars and the premolars. The canine teeth are cone shaped and sharp while the incisors are shaped like a chisel. The molars and premolars are for chewing and breaking down food.
Some mammals are herbivores and some are carnivores. Some are a combination of plant and meat eaters. They are omnivores. What a mammal eats determines the patterns of dentition in their teeth. This extends to both the number of teeth and the types.
Some animals have two sets of teeth. They are the deciduous set and the permanent set. These animals are diphyodont. Monophyodont animals have just one set.