A STUDY ON THE TIME OF DECIDUOUS TEETH ERUPTION (KUMAMOTO CITY)

Abstract

Oral examination with respect to the eruption time of deciduous teeth has been conducted on 2217 male and 1739 female infants within the age range of 3 to 29 months after birth, residing in Kumamoto city. The results are summarized as follows. 1) Eruption time (in postnatal months) [table] 2) The eruption time observed in the male infants was earlier than in the female infants. 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 comparison of the eruption time between both halves of the whole dentition.