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下顯乳臼齒의 根端病巢로 因한 繼承永久齒胚의 位置變化
THE POSITIONAL CHANGE OF SUCCESSIONAL PERMANENT TOOTH GERM CAUSED BY THE PERIAPICAL INFLAMMATION OF MANDIBULAR DECIDUOUS MOLAR

대한소아치과학회지 1986년 13권 1호 p.33 ~ 42

소속 상세정보

김동길(金東吉)/Kim Dong-Kil 김영진(金永進)/Kim Young-Jin

KMID : 0358919860130010033

Abstract

要約
小兒의 乳齒根端病巢에 依한 永久齒脚의 位置移動與否를 알기 위해 3∼9歲小兒中片側
에 만 根端病巢를 가지는 90名 (90個齒)를 調査群, 對照群으로 하고, 左右乳臼齒가 健全한
67名 (134個齒)을 臺常群으로 하여 下顎乳臼齒部에서 平行撮影法을 利用하여 標準規格放
射線像을 얻고 이를 觀察하여 다음의 結果를 얻었다.
正常群에서의 左右差
健全齒列을 가지는 小兒의 同一個體內에 있는 下顎第一, 二小臼齒類側咬頭頂의 近遠心
的左右差는 各各平均 0.51㎜, 0.60㎜였고, 垂直的左右差는 0.50㎜, 0.57㎜였으며, 齒牙長 ,
軸傾斜度의 左右差는 1 .00°, 1 .54°였다.
先行乳齒의 根端病巢에 依한 永久齒緋의 移動은 第一小臼齒 42例中 9例 (21.4%), 第二小
臼齒(구치) 48例中 13例 (27.1%)에서 觀祭되었으며, 全體的으로 90個齒中 22例 (24.4%)에
서 認定되었다.
根端病巢가 클수록 永久齒評의 位置移動이 많았다.
永久齒 의 位置移動은 齒冠形成段階인 No-lla's calcification stage 4∼6에서 觀祭되었으
며, 形成初期에서 더 높은 比率로 나타났다.
永久齒 의 位置移動이 認遠되는 境遇, 齒牙長軸角이 變한 移動은 第一小顧齒 9例中 5例
(55.6%), 第二小臼齒 13例中 6例 (46.2%)였었고, 全體的으로 22例中 11例(50.0%)가 變하였
다.
#초록#
This study was taken to examine the positional change of successional permanent
tooth germ caused by the periapical inflammation of mandibular deciduous molar. In this
study, the intraoral radiographs of 67 children(134 teeth) without caries in mandibular
deciduous molars and 90 children(90 teeth) with periapical inflammation of deciduous
molar in only one side were used as materials for the investigation.
The results of this study were as follows:
The average of the difference between right and left sides measured in buccal cusp
tip of mandibular first premolar, second premolar tooth germ of 67 children without
caries was each mesiodistally 0.51, 0.60㎜, vertically 0.50, 0.57㎜. The average of the
difference between right and left sides of tooth inclination was 1.00 degree in mandibular
first premolar, 1,54 degree in mandibular second premolar.
The positional change of permanent tooth germ caused by the periapical inflammation
of deciduous molar was found in 22 to 90 teeth(24.4%). The positional change was
found in 9 to 42 teeth in first premolar(21.4%), and 13 to 48 teeth in second
premolar(27.1%).
The positional change of permanent tooth germ was mostly found in the large size of
periapical lesion.
The positional change was mostly observed in the stage of the crown formation of
permanent tooth germ.
The tooth inclination could be changed by the positional change of the permanent
tooth germ caused by the periapical lesion of its deciduous molar, and it was found in
11 to 22 teeth (50.0%) totally. The change of tooth inclination was found in 5 to 9 teeth
in first premolar (55.6%), and 6 to 13 teeth in second premolar(46.2%).