Photopolymerized resins: surface hardness variation in relation to time of polymerization and setting / Resinas fotopolimerizadas: variação da dureza superficial em relação ao tempo de polimerização e endurecimento

ABSTRACT

The authors studied the superficial hardness of composite resins cured for two different times 20 and 40 seconds of light exposure. The hardnesss values were read immediately and 24 hours after polymerization. A significant increase in hardness was observed with 40 s exposure as compared to 20 s. Hardness values were significantly higher at 24 h than immediately after polymerization