METHODS:320 cases deciduous teeth with periapical periodontitis were randomly allocated to the test group( iodoform-calcium hydroxide) and the control group(formocresol) equally.

• 方法:选择320例乳牙根尖周炎病例,随机分为治疗组(氢氧化钙-碘仿糊剂组)和对照组(甲醛甲酚组)各160例,观察封药后48h,1周的临床疗效。