乳歯の萠出期に関する研究(北九州地区)

概要

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Ages for the deciduous teeth eruption have been studied on a total of 2744 sucklings and infants comprising 1481 males and 1263 females ranged in age from 4 to 26 months after birth, all residing in Northern Kyushu districts. 1) Ages for Deciduous Teeth Eruption (in Months) Refer to the following Table. [table] 2) With regard to sex difference in the eruption time, it was revealed that the time was generally earlier in the male than in the female. Eruption occurred earlier in the upper than in the lower dentition in the male members, while with the female members there was no appreciable difference in this point. Nor was there any marked difference observed in the eruption time between teeth of right and left quadrants of jaws.
1960-09-30