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KMID : 1004520140300020138
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Journal of Dental Rehabilitation and Applied Science
2014 Volume.30 No. 2 p.138 ~ p.144
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A study on the water sorption and the effect of water sorption on micro-hardness of dual-cure resin cements
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Choi Su-Jung
Cho Jin-Hyun
Lee Cheong-Hee
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Abstract
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Purpose: This study examined the water sorption of commonly used dual-cure resin cements and compared the change in the micro-hardness among the cements.
Materials and Methods: Five types of dual-cure resin cements (Maxcem, Duo-link, Panavia F, Variolink II, Rely X Unicem) were selected. Fifty specimens were classified into five groups containing ten specimens in each group. The water sorption of the five specimens in each group was evaluated after being immersed in distilled water (DDW) for seven days.
The following results were obtained by comparing the specimens immersed in DDW with those not immersed in DDW.
Results: 1. The water sorption of Maxcem showed the highest score, followed by Panavia F. These two cements were followed by Duo-link and Rely X Unicem. The water sorption of Variolink II showed the lowest score among the cements used in this study. 2. Among the specimens not immersed in DDW, the micro-hardness of Rely X Unicem showed the highest score followed by Panavia F and Variolink II. These cements were followed in order by Duo-link and Maxcem. 3. Among the specimens immersed in DDW, the microhardness of Rely X Unicem showed the highest score followed by Maxcem, Panavia F and Variolink II. Duo-link shoed the lowest score among the cements used in this study. 4. Maxcem, Duo-link, Panavia F and Rely X Unicem showed significant differences in micro-hardness due to water resorption but Variolink II was unaffected by immersion in water.
Conclusion: Using the resin cement which has lower water sorption and higher micro-hardness is recommended.
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KEYWORD
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dual-cure resin cement, hardness
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