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.

Microabrasion effect on enamel susceptibility to penetration of hydrogen peroxide: an experimental and computational study.

To evaluate in vitro transenamel/transdentinal of penetration of HO after microabrasive. Computational models were performed to verify peroxide penetration and evaluate if geometric modifications could affect in vitro results. Enamel/dentin blocks from bovine incisors were prepared and randomly divided into groups (n = 15) according with abrasive (35% phosphoric acid and pumice or 6.

Influence of different photoinitiators on the resistance of union in bovine dentin: Experimental and microscopic study.

Background: To evaluate the influence of photoinitiators on the microtensile strength of adhesive systems and composite resins in bovine dentin.

Material And Methods: Forty dentin obtained from bovine teeth were randomly distributed in four groups (n = 10) according to the different adhesive systems and composite resins used: G1 - AAPS + VAPS (Ambar APS + Vittra APS); G2- AAPS + O (Ambar APS + Opallis); G3 - A + VAPS (Ambar + Vittra APS) and G4 - A + O (Ambar + Opallis). After restoration with the composite, the samples were sectioned to obtain toothpicks that were subjected to the microtensile and nanofiltration test (1.

Effect of different adhesive strategies on the microtensile bond strength of dentin to indirect resin-based composite.

Background: To evaluate the microtensile bond strength of indirect resin composite bonded to dentin using five different adhesives strategies.

Material And Methods: Forty specimens (Solidex) were produced and randomly into five groups with different adhesives strategies: (G1)- Single Bond Universal + etch + silane + RelyX Ultimate, (G2)- Single Bond Universal + silane + RelyX Ultimate, (G3)- Single Bond Universal + etch + RelyX Ultimate, (G4)- Single Bond Universal + RelyX Ultimate, and (G5)-Scotchbond Multi-purpose + RelyX ARC. After cementation the specimens were stored in 100% humidity for 24hours at 37°C.