ABSTRACT: 0397

Adhesion of resin composites to root canal dentin

P. WATTANAMETAKUL, R. SAKOOLNAMARKA, and M. ARKSORNNUKIT, Chulalongkorn University, Bangkok, Thailand

Objectives: To evaluate the microtensile bond strengths (µTBS) of two core composites, namely Luxacore –Automix Dual and MultiCore Flow, to root canal dentin when using different adhesive systems.

Methods: Bonded specimens were allocated into 6 groups (N=20) according to the combination of core composites and adhesive systems (All bond 2, Excite DSC and Contax). The materials were used according to the manufacturers' instructions. The specimens were prepared for µTBS test. The measurements were performed using universal testing machine (LLOYD Instrument). Data were analyzed with two-way ANOVA (a=0.05)

Results: Means (SD) in MPa are shown in the table below

	All bond 2	Excite DSC	Contax
Luxacore –Automix Dual	23.59(9.51)	32.31(7.37)	21.50(6.59)
MultiCore Flow	30.45(12.97)	39.47(15.21)	33.79(15.66)

For Luxacore–Automix Dual groups, Contax showed the lowest µTBS, which were significantly different from those of Excite DSC. Among the MultiCore groups, Excite DSC showed the highest µTBS although the difference was not significant.

Conclusions: Adhesive systems affected the adhesion of Luxacore–Automix Dual to root canal dentin. However there was no effect on MultiCore Flow. For the two core composites used in this study, Excite DSC apparently showed better adhesion.

Seq #71 - Dentin Bonding Agents
2:00 PM-3:15 PM, Thursday, July 3, 2008
Metro Toronto Convention Centre Exhibit Hall D-E

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