Volume 26, Issue 122, April 2022

Evaluating micro shear bond strength of two different materials in permanent teeth

Rahbaryfar Sayeh¹, Rahimian Emam Sara², Nabavi Saide^3♦

¹DDS, Dental Research Center, Kerman University of Medical Sciences, Kerman, Iran
²Pedodontist, Shahed University of Medical Sciences, Tehran, Iran
³DDS, Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

^♦Corresponding author
DDS, Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

ABSTRACT

Aim: Caries on the grooved surfaces of posterior teeth is the most common type of caries in children and adolescents; a prerequisite for achieving a successful fissure sealant is proper isolation of etched enamel against saliva contamination. Recently, self-adhering flowable composites have received more attention due to simple application of this type of material, which allows proper insulation. Therefore, this study tends to compare microshear bond strength of fissure sealant and self-adhering flowable composite in permanent teeth. Methods: This experiment was performed on 30 dental samples in vitro in 2019-2020. After initial preparation, the teeth were randomly divided into 3 groups; the first group: acid etch (Den fil Etchant-37 / USA) + bonding (Tetric N-Bond / USA) + fissure sealant (Clinpro, ESPE 3M); the second group: acid etch + Vertise Flow; the third group: Vertise Flow. After thermocycling (500 cycles, 5-55ºC), shear bond strength was tested using Universal testing machine at 0.5 mm/min. Finally, the obtained data were evaluated using SPSS 21 statistical software and Independent T-test. Results: Composite of the third group was isolated from the tooth surface after thermocycling. Shear bond strength of the first group is 12.3±44.97 MPa and shear bond strength of the second group is 11.184±47 MPa. According to Independent T-test analysis, there is no statistically significant difference between group 1 and group 2. Conclusion: Self-adhering composite without acid etching has very low bond strength, so the use of this composite without acid etching is not recommended.

Keywords: Self-adhering flowable composite, Fissure sealant, Micro-shear bond strength

Medical Science, 2022, 26, ms138e1893

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DOI: https://doi.org/10.54905/disssi/v26i122/ms138e1893

Published: 18 April 2022