수산화칼슘제 sealer를 이용한 근관충전후 치근 상아질에서의 염기도 변화
PH CHANGES AT THE SURFACE OF ROOT DENTIN WHEN USING ROOT CANAL SEALERS CONTAINING CALCIUM HYDROXIDE
류엔, 전성민,
소속 상세정보
류엔 ( ) - 전북대학교 치과대학 치과보존학교실
전성민 ( ) - 전북대학교 치과대학 치과보존학교실
KMID : 0362319980230020710
Abstract
The pH changes in 3 cavities prepared at the facial inner dentin and lingual outer dentin of the cervical portion and apical portion of roots filled with calcium hydroxide contiaing sealei ; were investigated. 50 extracted permanent teeth with single canal were instrumented with step-back method. An irrigant of 5% NaOCI was used between files. Then 3 small cavities were prepared. The cavity of apical portion and inner dentin cavity of coronal portion was cut a distance of about 1.0mm from the canal wall and outer dentin cavity of coronal portion was cut to a depth of about 0.5mm from root surface. 10 teeth of control group was not filled. 20 teeth were not flushed with 17% EDTA before using root canal sealers and then divided into 2 groups obturated with Sealapex and Apexit. The remaining 20 teeth were flushed with 17% EDTA and 5% NaOCI to remove smear layer and divided into 2 groups obturated with Sealapex and Apexit. The pH change of the dentin in each cavity was measured at 0, 1, 3, 5, 7, 15, 30 days with pH microelectrode (WPI Co., USA).
The results were as follows:
The groups obturated with Sealapex and Apexit(calcium hydroxide based-sealers) have no increase in the pH level at root dentin. And there is no significant difference in pH level between groups obturated with Sealapex and Apexit (P>0.05) .
2. Differences in pH levels between the treated and untreated groups with EDTA were not significant (P>0.05).
3. There is no significant difference in pH level between apical and cervical dentin, inner and outer dentin throughout the duration of the experiment (P>0.05).
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