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KMID : 0362320110360020132
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Journal of Korean Academy of Operative Dentistry
2011 Volume.36 No. 2 p.132 ~ p.138
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Effect of curing modes on micro-hardness of dual-cure resin cements
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Lee Ki-Deok
Park Se-Hee
Kim Jin-Woo
Cho Kyung-Mo
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Abstract
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Objectives: The purpose of this study was to evaluate curing degree of three dual-cure resin cements with the elapsed time in self-cure and dual-cure mode by means of the repeated measure of micro-hardness.
Materials and Methods : Two dual-cure self-adhesive resin cements studied were Maxcem Elite (Kerr), Rely-X Unicem (3M ESPE) and one conventional dual-cure resin cement was Rely-X ARC resin cement (3M ESPE). Twenty specimens for each cements were made in Teflon mould and divided equally by self-cure and dual-cure mode and left in dark, , 100% relative humidity conditional-micro-hardness was measured at 10 min, 30 min, 1 hr, 3 hr, 6 hr, 12 hr and 24 hr after baseline. The results of micro-hardness value were statistically analyzed using independent samples t-test and one-way ANOVA with multiple comparisons using Scheffe’s test.
Results: The micro-hardness values were increased with time in every test groups. Dual-cure mode obtained higher micro-hardness value than self-cure mode except after one hour of Maxcem. Self-cured Rely-X Unicem showed lowest value and dual-cured Rely-X Unicem showed highest value in every measuring time.
Conclusions : Sufficient light curing to dual-cure resin cements should provided for achieve maximum curing.
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KEYWORD
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Curing mode, Dual-cure, Micro-hardness, Resin cement, Self-adhesive
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