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| neonatal teeth ： ウィキペディア英語版 |
neonatal teeth
Natal teeth are teeth that are present above the gumline (have already erupted) at birth, and neonatal teeth are teeth that emerge through the gingiva during the first month of life (the neonatal period).
The incidence of neonatal teeth varies considerably, between 1:700 and 1:30,000 depending on the type of study; the highest prevalence is found in the only study that relies on personal examination of patients.
==Presentation==
Most often natal teeth are mandibular central incisors. They have little root structure and are attached to the end of the gum by soft tissue and are often mobile.〔(【引用サイトリンク】url=http://www.nlm.nih.gov/medlineplus/ency/article/003268.htm )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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