In vivo에서 수종이장재의 산도변화에 관한 연구
IN VIVO CHANGES OF THE ACIDITY OF VARIOUS DENTAL LINERS
이미정, 남동석, 안연실, 이용우, 김문현,
소속 상세정보
이미정 ( ) - 전북대학교 치과대학 치과보존학교실
남동석 ( ) - 서울대학교 치과대학 치과보존학교실
안연실 ( ) - 전북대학교 치과대학 치과보존학교실
이용우 ( ) - 전북대학교 치과대학 치과보존학교실
김문현 ( ) - 전북대학교 치과대학 치과보존학교실
KMID : 0362319980230010433
Abstract
The purpose of this study was to observe the changes of acidity of resin cement (Time Line), glass ionomer cement(GC Fugi Lining LC), zinc phosphate cement(Fleck´ s zinc cement), zinc oxide eugenol cement ( Sultan,Chemists.) in vivo and in vitro. Class I cavities with 3mm depth were prepared on the occlusal surfaces of 20 recently extracted human Mn, molar teeth and 20 human Mn. 3rd molar teeth in oral cavity. The prepared cavities were divided into 4 groups of each 5 teeth using the above 4 cavity liners. Each cement was mixed in accordance with manufacturer´ s direction at the room temperature of 23 57C and filled into the cavity in a width of 1 mm. The microelectrode of pH meter was inserted into the prepared cavity which was filled with mixed cement, and the acidity of cement was measured for 3 days from the beginning of cement mix in vitro and in vivo. The measured acidity was then statistically analyzed by ANOVA.
The results were as follows.
1. In vitro, the pH of zinc oxide eugenol cement was statistically lower than that of the three other groups at 2min, 4min, 6min, 8min, 10min, 12min, 18min, 20min. (p<0.05).
2. The pH of zinc oxide eugenol cement in vivo was statistically higher than that in vitro at 16min,16min, 20min (p<0.05) .
3. The pH of zinc phosphate cement in vivo was statistically higher than that in vitro at 4min, 20min (p<0.05).
4. In vitro and in vivo, there was no significant difference in the pH between the resin cement and the glass ionomer cement(p>0.05).
5. The initial acidity was not high, but almost neutral in all kinds of the cements.
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