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目的:比较两种不同根管封闭剂在根管充填治疗术后24 h疼痛的发生情况.方法:选取2015年3月~2017年3月就诊牙髓炎、根尖周炎患牙172颗,随机分为两组.A组(n=91)用iRoot SP和牙胶尖进行根管充填, B组(n=79)用Vitapex加牙胶尖进行根管充填,比较两种根管糊剂在根管充填术后24 h的急症发生率.结果:两组病例术后24 h疼痛发生率差异有统计学意义(P<0.01).结论:iRoot SP在根管充填术后24 h内疼痛旳发生率明显少于Vitapex.“,”Objective:To compare the occurrence rate of short-term pain of two root canal seaters which was applied in root canal therapy wilth thermal gutta-percha.Methods:The patients with pulpities or periapical periodotities who received treatmentwere enrolled.The one hundred and seventy-two teeth were divided into group A(n=91)and group B(n=79).In group A,iRoot SP was used as the root canal filling paste and in group B with Vitapex.The occurrence rate of short-term pain of 24 h after root canal filling between the two groups were compared.Results:There was statistically significant difference in the 24 h efficacy the occurrence rate of short-term pain between two sealers(P<0.01).Conclusion:Root canal therapy app-ling iRood SP can decrease the occurrence rate of short-term pain of 24 h after root canal filling.