Effect of curing modes on micro-hardness of dual-cure resin cements

Article information

Restor Dent Endod. 2011;36(2):132-138

Publication date (electronic) : 2011 March 31

doi : https://doi.org/10.5395/JKACD.2011.36.2.132

Ki-Deok Lee, DDS , Se-Hee Park, DDS, PhD , Jin-Woo Kim, DDS, PhD , Kyung-Mo Cho, DDS, PhD

Department of Conservative Dentistry, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea.

Correspondence to Kyung-Mo Cho, DDS, PhD. Professor, Department of Conservative Dentistry, Gangneung-Wonju National University College of Dentistry, 120 GangneungDaehangno, Gangneung, Gangwon, Korea 210-702. TEL, +82-33-640-3155; FAX, +82-33-640-3103; drbozon@gwnu.ac.kr

Received 2011 January 29; Revised 2011 February 24; Accepted 2011 February 24.

Abstract

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, 36℃, 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.

Keywords: Curing mode; Dual-cure; Micro-hardness; Resin cement; Self-adhesive

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