Eruption Of Your Child's Teeth
Children’s teeth begin forming in the jaw structure prior to birth. As early as 4 months of age, the first primary teeth to erupt through the gums are usually the lower central incisors. Although all 20 primary teeth usually appear by age 3, the pace and order of their eruption often varies. Permanent teeth begin appearing around age 6, starting with the first molars and lower central incisors. By the age of 8 years, you can generally expect the bottom 4 front primary teeth (lower central and lateral incisors) and the top 4 front primary teeth (upper central and lateral incisors) to be gone and permanent teeth to have taken their place. There is then approximately a one to two year break before the rest of the permanent teeth will continue to come in. This process continues until approximately age 21 (including the wisdom teeth).
Adults have 28 permanent teeth, or up to 32 including the third molars (or wisdom teeth).