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- W2367770248 abstract "Objective Time-of-flight mass spectrometer was investigated for monitoring methyl methacrylate(MMA) released from autopolymerized denture base polymer(self-curing resin) at different polymerization temperature during processing.The effect of the polymerization temperature on the amount of MMA was analyzed.Methods Self-curing resin was mixed in the container at room temperature(20℃) using a ratio of 2 g of powder to 1 g of liquid in accordance with the manufacturer's instructions for 40s as a specimen.The amount of MMA released from the specimen was on line analyzed and simultaneously recorded every minute by time-of-flight mass spectrometer since immediately after mixing.A total of 15 specimens were monitored and analyzed for each curing cycle(five at room temperature 、five in water-bath at 40℃ and five in water-bath at 60℃).Results The tendencies of MMA released from 3 groups of specimens were similar.The releasing amounts of MMA in a water-bath at 40℃ and in a water-bath 60℃ were lower than the one at room temperature(P0.05).There was no significant difference in the releasing amounts of MMA between in a water-bath at 40℃ and in a water-bath 60℃(P0.05).The highest level were reached at 13 min(225.4±23.1)mg/L at room temperature,7 min(57.7±5.4)mg/L in a water-bath at 40℃,4 min(38.1±4.9)mg/L in a water-bath at 60℃.Conclusions Increasing polymerization temperature for self-curing resin from 20℃ to 40℃ or 60℃significantly reduced the releasing amount of MMA during processing.But Increasing polymerization temperature from 40℃ to 60℃ didn't significantly reduced the one." @default.
- W2367770248 created "2016-06-24" @default.
- W2367770248 creator A5087435778 @default.
- W2367770248 date "2013-01-01" @default.
- W2367770248 modified "2023-09-26" @default.
- W2367770248 title "Methyl methacrylate released from autopolymerized denture base polymers at different polymerization temperature during processing-monitoring by time-of-flight mass spectrometer" @default.
- W2367770248 hasPublicationYear "2013" @default.
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