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  • Title: In vitro bonding effectiveness of three different one-step self-etch adhesives with additional enamel etching.
    Author: Batra C, Nagpal R, Tyagi SP, Singh UP, Manuja N.
    Journal: J Investig Clin Dent; 2014 Aug; 5(3):226-36. PubMed ID: 23596010.
    Abstract:
    AIM: To evaluate the effect of additional enamel etching on the shear bond strength of three self-etch adhesives. METHODS: Class II box type cavities were made on extracted human molars. Teeth were randomly divided into one control group of etch and rinse adhesive and three test groups of self-etch adhesives (Clearfil S3 Bond, Futurabond NR, Xeno V). The teeth in the control group (n = 10) were treated with Adper™ Single Bond 2. The three test groups were further divided into two subgroups (n = 10): (i) self-etch adhesive was applied as per the manufacturer's instructions; (ii) additional etching of enamel surfaces was done prior to the application of self-etch adhesives. All cavities were restored with Filtek Z250. After thermocycling, shear bond strength was evaluated using a Universal testing machine. Data were analyzed using anova independent sample's 't' test and Dunnett's test. The failure modes were evaluated with a stereomicroscope at a magnification of 10×. RESULTS: Additional phosphoric acid etching of the enamel surface prior to the application of the adhesive system significantly increased the shear bond strength of all the examined self-etch adhesives. CONCLUSIONS: Additional phosphoric acid etching of enamel surface significantly improved the shear bond strength.
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