乳歯の萠出期に関する研究(大阪地区)
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概要
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Oral examination with respect to the eruption time of deciduous teeth has been conducted on 1588 male and 1342 female infants within the age range of 5 to 27 months after birth, residing in the cities of Osaka, Nishinomiya and Amagasaki. The results are summarized as follows. 1) Eruption time (in postnatal months) [table] 2) The eruption time as examined in the present study was slightly earlier than those reported by other investigators. Sex difference of the eruption time was almost negligible. Comparison of the eruption time between the same named teeth in upper and lower jaws revealed that the teeth in lower jaw tended to erupt earlier than those in upper jaw. No definite tendency was observed in the comparsion of the eruption time between both halves of the whole dentition.
- 1960-05-31