Effect of beveling with different grid size diamond fissure bur on resin bond strength
نویسنده
چکیده
Background: Diamond burs are recommended for grinding enamel and they are available in different grid sizes, therefore the aim of this study was to evaluate the effect of beveling with 4 different grid size diamond fissure bur s on shear bond strength of light cured composite resin. Materials and Methods: Forty extracted anterior teeth were sectioned at the level of cervical line. The crowns were embedded in cold cure acrylic resin exposing the labial surface. The specimens were divided into 4 groups according to the grid size of the diamond fissure bur which were used in flattening the labial surface (group I extra fine, group II fine , group III Medium , group IV coarse). Standardized cylinders of composite resin were bonded to the grinded surface, and testing was done with Zwick testing machine. Results: There is a non significant difference between all the four groups. Conclusion: The grid size of diamond burs didn't affect the resin bond strength to enamel.
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