How many types of toothbrushes are there?

+Incisors, Canines, Premolars, and Molars:+

+Incisors are for cutting and ingesting food, they are the front teeth.+

+Canines are for puncturing food (or dealing the deathblow on an animal if the canines belong a carnivore), they are that sharp pointy teeth that come after the incisors.+

+Premolars and Molars are used for processing the food and getting it ready to be digested in the stomach. Premolars are smaller than molars and have fewer bumps on them. These teeth types are different among different animals because the diets may be different and the teeth need to be able to digest the food the animal eats.