| THE COMPARATIVE STUDY OF THE MICROHARDNESS AND MICROLEAKAGE IN POLYMERIZATION OF COMPOSITE RESIN CURED WITH VISIBLE LIGHT AND PLASMA ARC CURING UNITS |
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| 가시광선과 플라스마 광선에 의한 복합레진 중합시 미세누출과 미세경도에 관한 연구 |
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김상배1, 이광수2 |
1강릉대학교 치과대학 소아치과학교실
2키즈 앤 주니어 치과의원 |
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| Abstract |
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Newly developed curing units(plasma arc curing units) operate at relatively high intensity and are claimed to result in optimum properties of composite resin in a short curing time. The purpose of this study was to evaluate the microhardness and microleakage at the resin-tooth interface of two types of composite resins polymerized with visible light and plasma arc curing units. The results from the present study can be summarized as follows 1. Microhardness in each depth was shown to be higher in group AHL than AP3 & AP6. Group ZHL was lower than AP6 at surface(p<0.05) and had no statistically significant difference at 1mm and 2mm(p>0.05). In other depths, group ZHL was higher than ZP3 and ZP6(p<0.05). 2. The incremental reduction in microhardness with depth was shown to be in all group except in surface-1mm of group AHL and 1~2mm of group ZHL(p<0.05). 3. Degree of microleakage in all oops were shown to be higher in gingival margin than occlusal margin but no statistically significant difference(p>0.05). 4. Differences between curing methods in microleakage were shown to be no statistically significant difference(p>0.05). 5. Differences between composite resins in microleakage were shown to be no statistically significant differ once(p>0.05). |
| Key Words:
Plasma arc curing units, Composit resin, Microhardness, Microleakage |
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