Teeth and MicrobesA child gets first tooth when he/she is six or seven months old. At the age of three a child has usually 20 teeth. The first set of teeth is called milk teeth or temporary teeth. When the child is about six years old, the milk teeth or temporary teeth begins to fall out. New teeth begins to GROW in place of milk teeth. These new teeth are called PERMANENT teeth. An adult human being has 32 permanent teeth.Types of TeethWe have different types of teeth in the upper and lower jaw of the mouth. Let’s see what are these different types of teeth.IncissorsIncisor teethIncisors are the four teeth at the front of each jaw. Therefore there are eight incisors teeth in total. They help to CUT and bite food.CaninesCanine teethThe teeth next to the incisors are canines. As they are sharp and pointed, they are used for tearing foods like meat. There are four canines in all.PremolarsPremolar teeth The two teeth next to each CANINE are premolars. They are flat and wide in shape. They help to crush food. There are eight premolars teeth.Molars