Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer.

Journal of Conservative Dentistry : JCD
Yasmine Mendes PupoJoão Carlos Gomes

Abstract

This study assessed the effect of the dentin depth and the application mode on the hardness and elastic modulus of the adhesive layer. Occlusal surfaces of 48 caries-free human third molars were removed, at two levels: Superficial and deep dentin. For each type of surface, the test specimens were randomly divided into groups which underwent the application: A conventional two-step adhesive system (Adper™ Single Bond [SB]) and self-etch adhesives system (Adper™ SE Plus [SE] and AdheSE(®) [AD]). The adhesives applied were active or passive. Composite build-ups were constructed incrementally. The teeth were sectioned, embedded, and polished. The nanoindentation test was performed in the adhesive layer. The results were analyzed by ANOVA and Tukey tests. In the adhesive layer, the higher hardness (0.307 ± 0.006 GPa) and elastic modulus (4.796 ± 0.165 GPa) of SE were obtained in superficial dentin in passive application. The elastic modulus of SE (4.115 ± 0.098 GPa) was lowest in active application in superficial dentin. The active application significantly increased the hardness of the SB in the deep dentin (0.011 ± 0.314 GPa) compared the superficial dentin (0.280 ± 0.010 GPa). For the AD, only the mode of application was statisti...Continue Reading

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Citations

Apr 20, 2014·International Journal of Oral Science·Ya-Rong ZhangHai-Yang Yu
May 31, 2015·Clinical Oral Investigations·Juliana Bomfigli TranquilinRoberta Tarkany Basting
Feb 27, 2013·Journal of Dentistry·Khalil I AleisaChristopher D Lynch

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