Abstract
Four different cement powders with varied indium trifluorides concentrations(0, 1, 2 and 3wt%)were made by adding indium trifluoride to tetracalcium phosphate powders.The experimental cement powders were refired at 1, 400℃ for two hours in air, then mixed with a 9.9wt% citric-39.5wt% malic acid aqueous solution at powder-liquid ratios of 1.0, 1.2 and 1.4(g/g).Setting time, compressive strength and disintegration of the experimental cements were determined according to the procedures outlined in ANSI/ADA Specification No.61 for zinc polycarboxylate cement.The setting time of the experimental cements at each concentration of indium trifluorides significantly decreased with increases in the powder-liquid ratio.The compressive strength of the experimental cements at each concentration of indium trifluorides significantly increased with increases in the powder-liquid ratio.The amount of disintegration decreased significantly as the powder-liquid ratio increased.
