Teething is the cause of occasional worry by parents, occasional fussiness by infants, and just plain curiosity by both! The general guidelines for incoming teeth are as follows: Central incisors usually come in around 6 months of age, lateral incisors around 8 months of age, first molars around 14 months of age, canines around 19 months of age, and second molars around 24 months of age. By 2 1/2 years of age, children should have 20 teeth. Remember to brush them daily! These 20 teeth remain until school age; then, the baby teeth will start to fall out and be replaced by the permanent teeth. Children should start seeing the dentist regularly around 3 years of age.