Both baby teeth (deciduous or milk teeth) and permanent teeth have fairly well-defined times of eruption. The ages listed are the normal ages that a baby tooth emerges.

UPPER	ERUPTS BY		LOWER	ERUPTS BY
Central incisor	8-10 Mo		Central incisor	6-9 Mo
Lateral incisor	8-10 Mo		Lateral incisor	15-21 Mo
Canine (Cuspid)	16-20 Mo		Canine (Cuspid)	15-21 Mo
First molar	15-21 Mo		First molar	15-21 Mo
Second molar	20-24 Mo		Second molar	20-24 Mo