The first adult teeth to appear in the mouth in a six year old child are the lower central incisors. The tips of the teeth appear to have three bumps or lobes, called mammalons. When the top and bottom incisor teeth erupt closer towards each other, your child will be able to use these teeth for chewing. The mammalons will get worn away through time, depending on how much chewing action they encounter, and also on the coarseness of the diet. (See worn enamel) Those children who grind their teeth at night will also wear away their mammalons quickly. Eventually, after years of use, a flat even edge is established on the tips of the incisors.
Mammalons on the lower incisors.