The first few years of a baby's life include many important milestones, such as first smiles, steps, words and teeth. At birth, a baby's jaw bone generally houses 20 primary teeth, which erupt in stages. The teething stages are only meant to be guidelines for parents, as each child develops at his own pace.
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Incisors are the first teeth to erupt, usually starting with the lower central incisors at 6-10 months of age. The upper central incisors erupt when the baby is 8-12 months old. Next come the upper lateral incisors, at 9-13 months, and the lower lateral incisors, at 10-16 months.
The next teeth to erupt are the canines, also known as cuspids. The upper canines erupt at 16-22 months, and the lower canines erupt at 17-23 months.
A baby's first molars generally appear shortly after his first birthday. The upper first molars erupt at 13-19 months, and the lower first molars erupt at 14-18 months. Around the child's second birthday, the second molars begin to erupt. The lower second molars erupt at 23-31 months, and the upper second molars erupt at 25-33 months.
Children begin to lose their primary teeth at 6-7 years of age. By age 17-21 years, all permanent teeth have erupted.
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