Marginal Gap of Light-activated Glass Ionomers for Base/liner Immediately after Ligth-activation : Effect of Powder-liquid Ratio

Abstract

The effect of the powder-liquid ratio in light-activated glass ionomers for base/liner on marginal gaps either in dentinal or teflon cavity, and shear bond strength to dentin was observed.Specimens were tested immediately after the light-activation.After increasing the amount of powder, the marginal gap did not decrease(p>0.10)in the dentinal cavity, but decreased(p<0.001)in the teflon cavity.Shear bond strength to human dentin increased(p<0.05)following the increased powder.The marginal gap in the dentinal cavity was not influenced by that in the teflon cavity and shear bond strength to dentin.