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机构地区:[1]大连医科大学附属第一医院口腔科,116011 [2]中国科学院大连化学物理研究所快速分离与检测实验室
出 处:《中华口腔医学杂志》2011年第4期245-247,共3页Chinese Journal of Stomatology
摘 要:目的 通过飞行时间质谱仪对自凝树脂聚合反应的全过程进行连续监测,动态分析甲基丙烯酸甲酯(methyl methacrylate,MMA)的变化趋势,以期为临床操作提供指导.方法 按生产厂家要求的比例将自凝义齿基托树脂粉剂2 g和液剂1 g调拌40 s后,即刻用飞行时间质谱仪连续监测MMA释放量,共监测5个样本.结果 MMA释放量在调拌后11 min时快速增加[(45.2±3.5)mg/L],13 min时达高峰[(228.9±22.6)mg/L];23 min时趋于稳定[(8.8±2.3)mg/L].结论 飞行时间质谱仪可连续监测自凝义齿基托树脂的聚合过程,精确地分析MMA释放量的变化趋势.结果 显示自凝义齿基托树脂聚合反应的MMA释放量变化较快.Objective To analyze the amount and tendency of methyl methacrylate(MMA) released from autopolymerized denture base polymer (self-curing resin) during processing using time-of-flight mass spectrometer(TOF-MS). Methods Self-curing resin was mixed in the container using a ratio of 2 g of powder to 1 g of liquid in accordance with the manufacturer's instructions for 40 s as a specimen. The amount of MMA released from the specimen was continuously monitored and simultaneously recorded every minute by TOF-MS since immediately after mixing. A total of five specimens were monitored. Results The amount of MMA increased dramatically at 11 min[(45.2 ±3.5) mg/L] after mixing, and reached the highest level at 13 min[(228.9 ±22.6) mg/L], then become stable at 23 min[(8.8 ±2. 3) mg/L] after mixing. Conclusions The releasing tendency of MMA could be analyzed accurately with continuously monitoring during processing. The amount of MMA released from self-curing resin changed rapidly and the processing was complicated and changeful.
分 类 号:TH843[机械工程—仪器科学与技术]
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