Altunsoy, MustafaBotsali, Murat SelimSari, TugrulOnat, Halenur2020-03-262020-03-2620150268-89211435-604Xhttps://dx.doi.org/10.1007/s10103-014-1640-2https://hdl.handle.net/20.500.12395/32037The aim of this study was to evaluate the effect of different surface treatments on the microtensile bond strength (mu TBS) of two different self-adhesive flowable composite materials (SACs) to dentin. Forty extracted human molars were horizontally flattened to expose the dentin surfaces. The teeth were divided into eight groups according to the surface treatments (acid etching, Er:YAG laser quantum square pulse (QSP) mode, and Er:YAG laser medium-short pulse (MSP) mode at 10 Hz, 1.2 W, 120 mJ, and control-SiC) and SAC type (Vertise Flow and Fusio Liquid Dentin) (n = 5). Light cured 4-mm-high composite build-ups were made on the dentin surfaces, and the specimens were sectioned into serial sticks (n = 15). Later, the specimens were attached to microtensile testing machine and tensile force was applied at a crosshead speed of 1 mm/min until failure occurred. The failure modes were evaluated using a stereomicroscope at x40 magnification, and one sample from each group was used for scanning electron microscopy (SEM) evaluation. The data were analyzed with two-way ANOVA and Tukey's HSD test (alpha = 0.05). In all surface treatment groups along with the control groups, Vertise Flow showed better mu TBS than the Fusio Liquid Dentin with the exception of the Er:YAG MSP mode surface treatment (p < 0.05). Etching with phosphoric acid and the Er:YAG QSP mode surface treatment significantly increased the mu TBS of Vertise Flow (p < 0.05). Etching with phosphoric acid, Er:YAG QSP mode surface treatment, and Er:YAG MSP mode surface treatment significantly increased the mu TBS of Fusio Liquid Dentin (p < 0.05). The mu TBS of Vertise Flow was higher than the mu TBS of Fusio Liquid Dentin. The Er:YAG laser irradiation increased the mu TBS of both self-adhesive flowable resin composites in two pulse modes tested (MSP or QSP). However, the highest mu TBS was recorded when Vertise Flow was applied with acid etching.en10.1007/s10103-014-1640-2info:eu-repo/semantics/closedAccessEr:YAG laserFlowable resinMicrotensile bond strengthSurface treatmentArticle3061667167325118664Q2WOS:000359138500005Q2