The molar teeth are behind the premolar teeth, have three roots and crowns with three to five cusps, and “grind.”
Two successive sets of teeth develop in humans, deciduous teeth (“baby” teeth) (Fig. 8.278B) and permanent teeth (“adult” teeth). The deciduous teeth emerge from the gingivae at between six months and two years of age. Permanent teeth begin to emerge and replace the deciduous teeth at around age six years, and can continue to emerge into adulthood.