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目的 研究室温固化甲基丙烯酸甲酯调合物各聚合反应期单体释放量及释放规律为临床制作临时冠桥及口内应用自凝塑料的安全可靠性提供参考。方法 用高精度电子天平测量定量自凝甲基丙酸甲酯调合物在各期单体释放量，并与橡皮期加热处理组单体释放量进行比较。结果 不加热处理组到橡皮末期单体释放量占释放总量的３１ ％ ，其后２４ 小时为６１ ％ ，加热处理组到橡皮末期释放量占总释放量的５８ ％ ，其后２４ 小时为３４ ％ 。经统计学处理表明加热组与不加热组在橡皮期及硬固后第一天单体释放量有显著性差别。结论 用间接法制作临时冠桥并进行热处理，可减少刺激牙髓及粘膜的单体的量
OBJECTIVE To study the release and release of monomer at different polymerization stages of room temperature curing methylmethacrylate to provide a reference for the clinical reliability and safety of temporary crown bridge and oral self-setting plastic. Methods High-precision electronic balance was used to measure the amount of monomer released from each phase of self-condensing methyl methylpropionate and compared with the amount of monomer released from rubber-heating group. Results In the non-heat-treated group, the release of rubber end-stage monomer accounted for 31% of the total released amount, followed by 61% in 24 hours, and the heat-treated group reached 58% of the total released amount in the rubber end, followed by 34 %. The statistical analysis showed that there was a significant difference in the monomer release between the first day and the erasing period and the non-heating period. Conclusions Indirect crown bridging and heat treatment can reduce the amount of monomer that stimulates pulp and mucosa