SITE LINK

下顎第一大臼齒의 萌出過程에 關한 硏究
THE STUDY OF THE ERUPTION PATTERN OF THE MAMDIBULAR FIRST PERMANENT MOLAR

대한소아치과학회지 1976년 3권 1호 p.19 ~ 31

황의강,

소속 상세정보

황의강 ( ) - 서울대학교 대학원 치의학과 소아치과학

KMID : 0358919760030010019

Abstract

To study the eruption pattern of the mandibular first permanent molar, the author took
263 cases of Oblique Cephalogram from age 3 to 6 years old childen and observed the
vertical and mesiodistal directional change and tooth axis change. The following results were obtained.:
1, The eruption pattern of the mandibular first permanent molar was changed at about 60-66 months or calcification stage ]X.
2. At the early stage, the path of eruption of the mandibular first permanent molar directed upward and forward and after calcification stage ]X it changed to the direction of upward
3. The height of the alveolar bone of the upper part of the mandibular first permanent molar was almost equal to that of the interseptal bone of the first and second deciduous molar, but the height showed gradual descent afterwards.
4. At the early stage, the distance from the distal end of the mandibular second deciduous molar to the anterior portion of the ascending ramus was 1.2^1.4 times larger than the mesio-distal diameter of the mandibular first permanent molar.