J Adv Prosthodont.  2015 Aug;7(4):317-322. 10.4047/jap.2015.7.4.317.

Effect of dentin pretreatment and curing mode on the microtensile bond strength of self-adhesive resin cements

• Youm SH
• Jung KH
• Son SA
• Kwon YH
• Park JK

• KMID: 2118268
• DOI: http://doi.org/10.4047/jap.2015.7.4.317

Abstract

PURPOSE
The aim was to evaluate the effect of curing mode and different dentin surface pretreatment on microtensile bond strength (microTBS) of self-adhesive resin cements.
MATERIALS AND METHODS
Thirty-six extracted human permanent molars were sectioned horizontally exposing flat dentin surface. The teeth were divided into 12 groups (3 teeth/group) according to the dentin surface pretreatment methods (control, 18% EDTA, 10% Polyacrylic acid) and curing mode (self-curing vs. light-curing) of cement. After pretreatment, composite resin blocks were cemented with the following: (a) G-CEM LinkAce; (b) RelyX U200, followed by either self-curing or light-curing. After storage, the teeth were sectioned and microTBS test was performed using a microtensile testing machine. The data was statistically analyzed using one-way ANOVA, Student T-test and Scheffe's post-hoc test at P<.05 level.
RESULTS
For G-CEM LinkAce cement groups, polyacrylic acid pretreatment showed the highest microTBS in the self-cured group. In the light-cured group, no significant improvements were observed according to the dentin surface pretreatment. There were no significant differences between curing modes. Both dentin surface pretreatment methods helped to increase the microTBS of RelyX U200 resin cement significantly and degree of pretreatment effect was similar. No significant differences were found regarding curing modes except control groups. In the comparisons of two self-adhesive resin cements, all groups within the same pretreatment and curing mode were significantly different excluding self-cured control groups.
CONCLUSION
Selecting RelyX U200 used in this study and application of dentin surface pretreatment with EDTA and polyacrylic acid might be recommended to enhance the bond strength of cement to dentin.

Keyword

Self-adhesive resin cements; Curing mode; Dentin surface pretreatment; Bond strength

MeSH Terms

Dentin*
Edetic Acid
Humans
Molar
Resin Cements*
Tooth
Edetic Acid
Resin Cements

Figure

• 

  Fig. 1 Graph showing differences between two self-adhesive resin cements on µTBS (MPa) when self-cured. The under bar indicates that there were significant differences (P<.05). Abbreviations; EDTA: ethylenediaminetetraacetic acid, PA: polyacrylic acid, G-CEM: G-CEM LinkAce™, U-200: RelyX™ U200.

• 

  Fig. 2 Graph showing differences between two self-adhesive resin cements on µTBS (MPa) when light-cured. The under bar indicates that there were significant differences (P<.05). Abbreviations; EDTA: ethylenediaminetetraacetic acid, PA: polyacrylic acid, G-CEM: G-CEM LinkAce™, U-200: RelyX™ U200

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