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

Ki-Deok Lee; Se-Hee Park; Jin-Woo Kim; Kyung-Mo Cho

doi:10.5395/JKACD.2011.36.2.132

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Basic Research Effect of curing modes on micro-hardness of dual-cure resin cements: Ki-Deok Lee, DDS, Se-Hee Park, DDS, PhD, Jin-Woo Kim, DDS, PhD, Kyung-Mo Cho, DDS, PhD; Journal of Korean Academy of Conservative Dentistry 2011;36(2):132-138.
DOI: https://doi.org/10.5395/JKACD.2011.36.2.132
Published online: March 31, 2011

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: January 29, 2011 • Revised: February 24, 2011 • Accepted: February 24, 2011

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Abstract
REFERENCES

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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Figure 1

Schematic drawing of moulds.

Figure 2

Micro-hardness changes of test groups with the time. VHN, Vicker's hardness number.

Table 1

Composition of materials used in this study

Table 2

Micro-hardness value of test groups in each measurement times (VHN)

The number in the parentheses are the standard deviation.

VHN, Vicker's hardness number.

Different superscript letters mean statistical difference in each measured time.

Table 3

Significances between self and dual curing of each resin cements (independent samples t-test)

Tables & Figures

REFERENCES

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

J Korean Acad Conserv Dent. 2011;36(2):132-138. Published online March 31, 2011

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

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

Figure 1 Schematic drawing of moulds.

Figure 2 Micro-hardness changes of test groups with the time. VHN, Vicker's hardness number.

Figure 1

Figure 2

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

Table 1

Composition of materials used in this study

Table 2

Micro-hardness value of test groups in each measurement times (VHN)

The number in the parentheses are the standard deviation.

VHN, Vicker's hardness number.

Different superscript letters mean statistical difference in each measured time.

Table 3

Significances between self and dual curing of each resin cements (independent samples t-test)

Table 1 Composition of materials used in this study

Table 2 Micro-hardness value of test groups in each measurement times (VHN)

The number in the parentheses are the standard deviation.

VHN, Vicker's hardness number.

Different superscript letters mean statistical difference in each measured time.

Table 3 Significances between self and dual curing of each resin cements (independent samples t-test)