Effect of curing modes on micro-hardness of dual-cure resin cements.
10.5395/JKACD.2011.36.2.132
- Author:
Ki Deok LEE
1
;
Se Hee PARK
;
Jin Woo KIM
;
Kyung Mo CHO
Author Information
1. Department of Conservative Dentistry, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea. drbozon@gwnu.ac.kr
- Publication Type:Original Article
- Keywords:
Curing mode;
Dual-cure;
Micro-hardness;
Resin cement;
Self-adhesive
- MeSH:
Humidity;
Light;
Polytetrafluoroethylene;
Resin Cements
- From:Journal of Korean Academy of Conservative Dentistry
2011;36(2):132-138
- CountryRepublic of Korea
- Language:Korean
-
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, 36degrees C, 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.
