Effect of beveling with different grid size diamond fissure bur on resin bond strength

الملخص EN

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 son 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.