Teething is the eruption of the deciduous teeth which most children experience without difficulty. It is a natural, gradual and predictable process but the timetable varies from baby to baby.
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Deciduous teeth
- Most deciduous teeth begin to erupt at 5–7 months of age and teething is completed by 2–3 years
- The mandibular central incisors erupt first, then the two or four maxillary incisors followed by the lower lateral incisors
- After a few months, the four molars appear (lower ones at 12 months, the upper ones at 14 months)
- After the cuspid teeth appear at 16–18 months of age the second molars erupt at 25–33 months
- About 25% of normal babies may have delayed eruption of teeth until 4 or 6 teeth simultaneously appear after their first birthday
- Premature babies erupt teeth according to their gestational age rather than chronological age. If teething seems particularly delayed, refer patient to a pediatric dentist.
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Teeth in neonates
- One in 2000 neonates are born with a tooth (appears to be familial)
- These neonatal teeth may be loose but most are the normal deciduous lower central incisors and can persist
- Mild ulceration in the sublingual area has been reported in 18% of these babies
- Because of the potential for aspiration there is some controversy about elective removal of the loose teeth (most pediatric dentists would remove these teeth if they are loose)
- System(s) affected: Gastrointestinal
- Genetics: N/A
- Incidence/Prevalence in USA: N/A
- Predominant age: Birth to 2 1/2 years
- Predominant sex: N/A