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KMID : 0355219790040010001
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Journal of Korean Academy Oral Medicine
1979 Volume.4 No. 1 p.1 ~ p.12
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A study on the fluoride and Oral Health in Korea
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Abstract
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In order to evaluate the normal eruption time. of the Korean permanent teeth, the author had examined the eruption phases of permanent cnnteral incisors in 714 made and 581 female children aged from 4.5 to 9 -year old and. analysed.
The eruption was devided into 3 phases; the tips of the crown can be seen, the half of the crown can be easily seen, and the full length of the crown can be seen.
The obtained results were as follows
1. It seemed that percentage of the erupting and erupted permanent central incisor in female by age was higher than that of male.
2. In general, percentage of the erupting and erupted lower central incisor by age was higher than that of upper first molar.
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KEYWORD
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