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The effect of bleaching agent on the microhardness of composite resins | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 20, Issue 1, 2008, Pages 14-15 | ||
| Author | ||
| Saif Alarab A. Alajwadi | ||
| Abstract | ||
| ABSTRACTBackground: The aim of this in vitro study was to evaluate the effect of H2O2 bleaching agent on the microhardness of composite resinsMATERIALS AND METHODS: Twenty samples were made from two types of composite resins then divided into 2 groups .The microhardness value (VHV) was determined for each sample of the two groups before or and after treatment with 35% H202 bleaching agent using microhardness tester.RESULTS: The statistical analysis of the results using one way ANOVA and paired t test indicated that there is a significant reduction In microhardness of 3M after bleaching application and there is a non significant reduction in microhardness of Tetric ceram.CONCLUSION: Within the limit of this in vitro study, it can be said that 35% H2O2 has no significant effect on the microhardness of Tetric ceram composite resins while can reduce the microhardness of 3M composite resins .Key words: Bleaching, hardness. (J Bagh Coll Dentistry 2008; 20(1)14-15) | ||
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