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目的对比观察氢氧化钙和甲醛甲酚用于根尖周炎患牙根管内封药的疗效。方法选择2008年1月到2009年12月在中国医学科学院整形外科医院口腔中心就诊的135例牙根尖周炎患者的156颗患牙,随机分为A组(81颗)和B组(75颗)。步退法根管预备后分别于根管内封入氢氧化钙(A组)和甲醛甲酚(B组)进行消毒。于封药后1周、根充后1周和治疗后3个月对两组疗效进行观察并作出相应评价。结果根管封药后1周A组的有效率为92.59%,B组的有效率为78.67%,两组间差异有统计学意义(P<0.05);根管充填后1周,A、B两组的急症发生率(3.70%对12.0%)差异有统计学意义(P<0.05)。治疗后3个月A组的成功率为91.36%;B组为84.00%,两组间差异有统计学意义(P<0.05)。结论氢氧化钙用于根尖周炎患牙根管内消毒的疗效优于甲醛甲酚。

Comparison of the disinfection effects of calcium hydroxide and formocresol on teeth with periapical periodontitis

Objective To study the disinfecting effects of calcium hydroxide and formocresol on fistula periapical periodontitis in root canals of infected teeth.Methods A total of 156 teeth with fistula periapical periodontitis were divided into two groups.Group A（81 cases） was disinfected using calcium hydroxide and Group B（75 cases） using formocresol.Both types of disinfectants were put into root canals by using step-back techniques,and their therapeutic effects were examined at different time later.Results Both disinfectants led to alleviation or disappearance of toothache.The therapeutic effect of calcium hydroxide was better（92.59%） than that of formocresol（78.67%） in a week.The teeth with root canal therapy emergencies（RCTE） in group B were more than in group A during and after root canal therapy.There was statistical significance in the effect of the two groups.Conclusion For teeth with fistula periapical periodontitis calcium hydroxide is a relatively suitable root canal disinfectant.