Abstract
The objective of this study was to examine the effect of different powder-liquid ratios and surface treatment agent on the wettability and bond strength of glass ionomer cement for restorative filling to human dentin.
The wettability and tensile bond strength of conventional or light-cured glass ionomer cements for restorative filling to human dentin were measured according to methods previously described.
A significant correlation (r=0.983, p<0.05) was found in the light-cured glass ionomer cement between the powder-liquid ratio and the measured contact angle; however, there was no significant correlation (r=0.154, p>0.05) in the conventional glass ionomer cement between the variables. Significant correlations between the powder-liquid ratio and tensile bond strength were observed in both conventional (r=0.978, p<0.05) and light-cured glass ionomer cement (r=0.933, p<0.05).
Although the contact angle of both cements to human dentin did not show remarkable change after the application of a surface treatment agent to the human dentin surface, significant increases in the tensile bond strength were found in both types of glass ionomer cements.
The results of this study suggested that the application of dentin surface treatment was an effective procedure to increase the bond strength of glass ionomer cement for restorative filling to dentin.
