一、治疗方法:将患齿开髓,扩大髓腔拔除牙髓,机械扩大根管,用双氧水及生理盐水交替冲洗,干燥根管后置碘仿糊剂根充(要尽量超充),髓房用氧化锌水门汀银汞充填(或水门汀银汞充填)。二、治疗效果:48例中3～7岁者45例,7岁以上者3例。其中牙髓坏疽20例,牙髓坏疽并急性根尖周围炎13例,慢性根尖周围 First, the treatment: the affected teeth open pulp, expand the pulp cavity to remove the pulp, mechanical expansion of the root canal, alternating rinse with hydrogen peroxide and saline, dry root canal iodine imitation paste root filling (to be super-charge), pulp Room with zinc oxide cement amalgam fill (or cement amalgam filling). Second, the treatment effect: 48 cases of 3-7 years old in 45 cases, 7 years of age in 3 cases. 20 cases of pulp gangrene, pulp gangrene and acute periapical inflammation in 13 cases, around the chronic apical