象牙質面의 酸龐蝕 效果에 關한 走査電子類黴鏡的 觀察
THE EFFECT OF ACID ETCHING ON DENTIN SURFACE EXAMINED BY SEM
소속 상세정보
이원재(李元宰)/Lee Won-Jae
김영진(金永進)/Kim Young-Jin
KMID : 0358919860130010017
Abstract
要 約
本 實驗은 乳齒와 永久齒의 象牙質面에 對한 酸의 濃度, 種類 및 適用時間에 따른 酸腐蝕
效果와 酸腐蝕 後 象牙質-레진 境界面의 變化와 象牙細管內로 浸透하는 레진突起의 樣相을
알아 보기 위하여 拔去된 62個의 小臼齒와 23個의 乳臼鬪齒를 對象으로 Orthophosphoric
acid, 蝶酸 및 枸隊酸으로 腐蝕 處理하여 走査電子顯徵鏡으로 比較 觀察을 하고 다음과 같
은 結論을 얻었다.
酸腐蝕 後 象牙質面은 象牙細管의 入口가 開放, 擴張되었으며 (直徑 3∼5 μm, 表面에서
若 10∼20 μm 깊이까지 浸透되었다.
酸의 濃度 및 適用時間에 따른 腐蝕效果의 顯著한 差異는 없었다.
栒緣酸이 燐酸보다 多少 弱한 腐輦效果를 보였다.
酸處理한 境遇 象牙質-레진 境界面은 더욱 緊耉하게 나타났다.
酸處理한 境遇 擴張된 象牙細管內로 레진突起의 浸透가 顯著하였으며 (길이 10∼25 μm)
象牙質의 乾燥狀態에 影響을 받았다.
모든 實驗에서 乳齒와 永久齒 사이에 顯著한 差異는 없었다.
#초록#
The purpose of this study was to make more extensive search for acid etching effect
of dentin surface with 23 deciduous molars and 62 premolars.
Samples were examined with a scanning electron microscope (SEM) to determine if
there had been visible structural changes according to various kinds, concentrations and
exposure times of acid, and to observe interface between dentin and resin, and resin tag
penetration to dentinal tubule.
The results of this study were as follows:
The dentin surface after treatment with acid etching solution showed that tubule
aperature were opened and widened (3-5μm in diameter), extended 10-20μm below the
surface.
The etching effect to various concentrations and exposure times of acid gave no
apparent difference in appearace of dentinal surface.
Treatment with citric acid had a milder etching effect than treatment with phosphoric
acid for same exporsure time.
The interface between dentin and resin had a more closeness after acid treatment.
Resin tag penetrations were apparent after acid treatment (10-25μm in length) and their
extent were influenced by dry condition of dentin.
No significant difference was found between deciduous and permanent tooth in all
experiment.
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