An adult human mouth typically contains 32 teeth, including eight premolars, 12 molars, eight incisors, four canines and four wisdom teeth. Children generally have 20 deciduous or baby teeth, including eight molars, eight incisors and four canines.
The first teeth to form in infants are the two bottom front teeth, which occurs when a baby is 6 to 12 months old. Teething in children stops by age 3, at the end of which 10 maximally or upper baby teeth and 10 mandibular or lower teeth have come out. With the exclusion of the four wisdom teeth, a normal adult will have a complete set of permanent teeth by age 13. The wisdom teeth usually develop by age 18.