Influence of the volume of restorative material on the concentration of stresses in the restorative interface.

Background: To evaluate the microtensile strength in the adhesive interface depending on the volume of the composite resin used to restore class I cavities.

Material And Methods: Forty-eight human third molars received a standardized class I cavity preparation and they were separated into six experimental groups: G1 - single-bottle adhesive system; G2 - bonding system with load; G3 - single-bottle adhesive associated with low-viscosity composite resin; G4 - loaded adhesive associated with low-viscosity composite; G5 - resin-modified glass ionomer associated with single-bottle adhesive; and G6 - resin-modified glass ionomer associated with loaded adhesive. All cavities were restored with a universal restorative composite.