人工 初期 蝕琺瑯質과 再石灰化 琺瑯質의 表面 徵細構造에 關한 硏究
ULTRASTRUCTURAL STUDY OF ENAMEL SURFACE LAYER OF ARTI FICIALLY INOUCEO ANO REMINERALIZED INCIPIENT CARIOUS LESION
소속 상세정보
김용기(金容琦)/Yong-Kee Kim
김진태(金鎭泰)/Jin-Tae Kim
KMID : 0358919870140010181
Abstract
結 論
初期 蝕過程中의 脫灰 및 再石灰化 機轉의 理解에 도움이 되는 基礎資料를 提供하기 爲
하여, 乳齒와 永久齒를 對象으로 初期 琺瑯質 蝕病巢를 人工的으로 誘發시키고 다시 再石
灰化를 試圖한 後에 各各 走査電子顯微鏡으로 表面 微細構造를 觀察하고, 깊이에 따른 琺瑯
質 微細硬度를 測定하여 다음과 같은 結論을 얻었다.
1. 全般的인 表面 微細構造에 있이서 乳齒와 永久齒間의 뚜렷한 差異는 없었다.
2. 人工 齬蝕 琺瑯質群에서 建全 琺瑯質群에서는 볼 수 없는 表面 破壞 樣相이 特徵的으
로 나타났다.
3. 本 實驗條件下에서 初期段階의 人工 齬蝕이 發生하였고 誘發된 病巢의 全般에 걸쳐 상
당한 量의 再石灰化가 이루어졌음을 알 수 있었다.
4. 弗素 溶液에서 處理된 Ⅳ群의 硬度가 Ⅲ群에 比해 全般的인 優位를 維持함으로써, 弗素
의 再石灰化 促進 效果를 再確認하였다
5. 巢狀孔等의 缺陷 構造物들이 特定群에 偏重되지 않게 나타났다.
6. 肉眼으로는 正常과 區別하기 어려운 初期 齪餘 病巢의 表層 琺瑯質은 그 微細構造上
결코 健全하다고는 할 수 없다.
#초록#
To provide basic informations for understanding the mechanism of de- and
remineralization in the early stage of enamel caries, a scanning electron microscopic
study of the enamel surface layer of artificially created and remineralized carious lesion
has been conducted in deciduous as well as permanent teeth.
Mierohardness profiles were also determined with Victors diamond load indenting at
about 25 μm intervals across the cut and polished surface from the outer enamel
surface.
The main results obtained were as follows:
1. In terms of general ultrastructural features of enamel surface layer under scanning
electron microscope, no significant differences were observed between deciduous and
permanent sample gloups, while the most deciduous samples showed the higher values
in microhardness than the respective permanent ones.
2. The characteristic findings of the enamel surface layer in the artificially induced
enamel lesion group (Ⅱ) under scanning electron microscope were ; the slight
enlargement of prism sheath, partial dissolution of prism core and the irregular pattern
of surface destruction.
3. Typical pattern of incipient enamel lesion was induced artificially under the present
experimental condition and considerable amount of remineralization occurred through the
entire depth of lesion.
4. Remineralized enamel lesion group treated in fluoride containing RS-2 maintained
overall higher values in microhardness than the one treated in RS-1 which had no
fluoride in it.
5. Focal holes and enamel caps, which were frequently found both in normal and
carious enamel group without any preponderance, should be reconsidered as the normal
microstructural components existing on the enamel surface.
6. The surface enamel layer of incipient carious lesion cannot be considered to be
intact.
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