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小臼齒에 발생한 發生한 Dens Evaginatus의 臨床的硏究
A Clinical Study of Dens Evaginatus In the Premolars

치과방사선 1981년 11권 1호 p.59 ~ 66

소속 상세정보

최승규(崔勝圭)/Sung Kyu Choi

KMID : 0378219810110010059

Abstract

本硏究는 學生 6,356名과 成人 10,227名을 對象으로 上下顎小臼齒에 發生한 dens
evaginatus의 形態를 石膏膜型上에서 分類, 調査하고 放射線撮影像에서 이 發育奇形으로 因
한 齒根端病變등의 惹起與否를 觀察하여 다음과 같은 結論을 얻었다.
1. 韓國人學生에서 dens evaginatus외 發生頻度는 2.6%이었으며 性差는 認定할 수 없었
다.
2. 齒牙別 dens evaginatus의 發生은 下顎第 1小臼齒, 下顎第 2 小臼齒, 上顎第 1 小臼齒,
上顎第 1 小臼齒의 順으로 많았다.
3. 調査對象者의 73.5%에서 兩側性인 發生을 보였다.
4. 形態에서는 乳頭形이 제일 많았으며, 齒冠面과의 關係는 濤狀으로 分明하게 分離된 境
遇가 제일 많았다.
5. 上顎에서는 結節이 類側咬頭의 舌側隆線上에 있거나 中央溝까지 延長된 型이, 下顎에서
는 擺傭咬頭中央에 있는 型이 많았다.
6. Dens evaginatus가 있는 齒牙中放射線像에서 齒慇 및 齒根端에 病變을 일으킨 例가
94.4%이었다.
#초록#
The dens evaginatus was a developmental variation which has arisen as a result of
art evagination of inner enamel epithelium into the enamel organ. It has been given
various, names by authors and was thought to be confined to Mongolian race. This
study was performed to observe the incidence of dens evaginatus, and its ill-effects on
the teeth and surrounding structures in 6356 Korean students and 10227 Korean adults.
In plaster modes analysis was performed in accordance with forms and location of dens
evaginatus on the occlusal surface in the premolars- The pathologic changes caused by
dens evaginatus were observed in paralleling periapical radiograms
The results were as follows:
1. The prevalence of dens evaginatus in the student's group was 2.6%, and showed
no sex predilection in the occurrence of evaginated teeth.
2. The sequence of dens evaginatus was in order of mandibular and premolar,
mandibular 1st premolar, maxillary 2nd premolar, and maxillary 1st premolar,
respectively.
3. Of the crises with dens evaginatus, 73.5% occurred bilaterally
4. The nipple form was the most frequent in respect of elevation of tubercle on theft
occlusal surface.
5. In the base form of the tubercle, the occurrence of grooved form was the highest.
6. In the maxilla, those cases which the tubercle arose from the lingual ridge of the
buccal cusp were most predominant. And in the mandible, those crises which the
tubercle arose from the center of the occlusal surface were the most frequent.
7. The pulpal and periapical complications were shown in 24.4% of evaginated teeth in
periapical radiogram.