永久齒 齒胚形咸에 關한 硏究
STUDIES ON THE AMOUNTS OF DEVELOPING PERMANENT TOOTH GERM
소속 상세정보
김진태(金鎭泰)/Jin Tae Kim
KMID : 0358919780050010007
Abstract
下顎小臼齒의 齒胚形成狀態를 硏究하고자 45度 斜方 頭部X線規格寫眞을 通하에 滿3歲에서
13歲까지의 男兒 334名 女兒 299名 合計 633名을 對象으로 齒胚形成量을 年齡別 性別로 計
測 觀察한 바 다음과 같은 結果를 얻었다.
1. 齒胚形成이 가장 活潑한 時期는 男女 共히 10歲 前後에서 나타났다.
2. 年間形成量의 增加率이 最高値는 第一小臼齒에서는 女子쪽이 높은 値를 나타냈고 第二
小臼齒에서는 男子가 最高値를 나타냈다.
3. 形成完了時期는 女子側이 第一, 第二小臼齒에서 共히 빨랐다.
#초록#
Of 633 children, 334 in male and 299 in female, whose ages ranged from 3 to 13 years
old, the amounts of development of teeth germ were observed according to ages with
oblique lateral cephalogram to study the developing state of teeth germ of mandibular
premolars.
The results were as followings ;
1. The time of actively developing tooth germ was observed about 10 years old both in
male and in female.
2. The increasing rate of development of tooth germ a year was higher in female than
in male at mandibular 1st premolar and in male than in female at mandibular 2nd
premolar.
3. Age of complete tooth germ development was earlier in female than in male at
mandibular 1st and 2nd premolars.
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