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Friday, 28 October 2016
Assessment of the initial and aged dentin bond strength of universal adhesives
Published Date October 2016, Vol.70:53–61,doi:10.1016/j.ijadhadh.2016.05.008 Author
David C.S. Farias a
Mauro A. Caldeira de Andrada b
Lee W. Boushell c
Ricardo Walter d,
aDepartment of Dentistry, Universidade CEUMA, Sao Luis, Brazil
bDepartment of Dentistry, Center of Health Sciences, Universidade Federal de Santa Catarina, Florianópolis, Brazil
cDepartment of Operative Dentistry, University of North Carolina School of Dentistry, Chapel Hill, NC, USA
dDepartment of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, USA
Accepted 16 May 2016. Available online 26 May 2016.
This study evaluated the effect of mechanical loading on microtensile bond strengths (μTBS) of universal adhesives to dentin and quantified adhesive dentin penetration using micro-Raman spectroscopy. Human molars had occlusal dentin exposed and were allocated into eight groups: All-Bond Universal and Scotchbond Universal using etch-and-rinse and self-etch approaches, Adper Prompt L-Pop, Adper Single Bond Plus, Clearfil SE Bond, and Optibond FL. Following bonding procedures and build-ups, specimens were either stored in water at 37 °C for 24 h or mechanically loaded (50,000 cycles, 50 N) prior to μTBS test. Additional teeth were prepared for micro-Raman analysis of adhesive penetration and FE-SEM. Data were analyzed by two-way ANOVA and Tukey׳s post hoc test (P<0.05). Mechanical loading had no deleterious effect on μTBS with the exception of Adper Prompt L-Pop. Incomplete infiltration of the demineralized dentin was noticed for adhesives using the etch-and-rinse approach and for Scotchbond Universal in the self-etch approach.
The work in this manuscript was performed in partial fulfillment of requirements for DMSc degree. David Farias was DMSc candidate at the Universidade Federal de Santa Catarina and completed the studies at the University of Pennsylvania.
Corresponding author. Present address: University of North Carolina, School of Dentistry, Department of Operative Dentistry, 445 Brauer Hall, CB #7450, Chapel Hill, NC 27599-7450. Tel.: +1 919 537-3442.
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