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Molars = These are larger than premolars and extremely variable depending on the animal's diet. Like premolars they are used for crushing and grinding food, and like premolars their upper surfaces have ridges called cusps on them. Molars normally have three to five cusps and two or three roots. In humans we call the third molars, those closest to the back of the mouth 'Wisdom Teeth'.
The human teeth function in mechanically breaking down items of food by cutting and crushing them in preparation for swallowing and digestion. There are four (4) different types of teeth.Namely: Incisors, Canines, Molars and Pre-Molars. Each type of tooth has a different job.The Incisors cut the food, the Canines tear the food and the molars and pre-molars crush the food. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums.ach type of tooth has a different job. The Incisors cut the food, the Canines tear the food and the molars and pre-molars crush the food. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums.