Method 78 children patients with periapical lesions were divided into two groups at random,group A was treated with calcium-hydroxide-iodoform paste,group B with calcium-hydroxide paste.

• 方法：78名儿童患者被随机的分成两组，A组用氢氧化钙碘仿糊剂治疗，B组用氢氧化钙糊剂。