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KMID : 1157520170130040183
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International Journal of Clinical Preventive Dentistry
2017 Volume.13 No. 4 p.183 ~ p.188
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An Experimental Study on the Microhardness of 4 Kinds of Direct Composite Resins
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Kim Nam-Joong
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Abstract
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Objective: The objective of this study is to compare the microhardness of various direct composite resins.
Methods: The authors performed experiments on the microhardness of direct composite resins after polymerizing 4 kinds of direct composite resins on the medio-occluso-distal cavity (MOD) standard specimens.
Results: The microhardness of Z350 was the highest (p＜0.05). According to post-hoc study with Turkey honest significant difference by multiple comparison on microhardness test results, there were statistically significant differences between all kinds of direct composite resin. The microhardness of the direct composite resin past the expiration date was the lowest.
Conclusion: Z350 scored the highest concerning the microhardness, and there was a statistically valid difference from the direct composite resin past its expiration date.
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KEYWORD
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composite resin, hardness
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