| 각종 치과용 세멘트의 경화열 측정 |
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박덕상 |
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서울대학교 대학원 치의학과 보존학 |
| THE MEASUREMENT OF EXOTHERMIC TEMPERATURE OF VARIOUS DENTAL CEMENTS |
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Deok-Sang Pahk |
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Dept. of Operative Dentistry, Graduate School, Seoul National University |
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| Abstract |
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The author measured exothermic temperature of the 5 kinds of zinc phosphate cement and 3 kinds of copper phosphate cement during setting process. Cements were mixed on the glass slab with flexible steel spatula at room temperature (25.8℃) for one minute (spatulating speed was 100 strokes per minute) and placed in the incubator of which temperature was held at 37℃ and thermometer was inserted into the cement mass. The powder liquid ration was 3.0gm:1ml and 1.5gm:1ml. The results were as follows. 1) The heat generated after mixing these cements was under 47.22℃. 2) The range of thermal change of the zinc phosphate cements during setting process was wider than copper phosphate cements. 3) The exothermic temperature from the thin mix was higher than thick mix. 4) The exothermic temperature of the zinc phosphate cements was higher than copper phosphate cements. |
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