治疗方法:选择临床常见的牙髓坏疽和坏死,包括一部分已发生慢性根尖周炎的病牙,经过技髓处理,将三聚甲醛制剂一干髓剂放在根管口处,山缓慢而持久游离出的甲醛气体控制和消除根管内的感染,根炎周组织的炎症也可以得到控制。操作步骤:(1)开髓:技除髓室及根管内感染及坏死牙髓。(2)用3%双氧水和生理盐水冲 Treatment options: Select clinical common dental pulp gangrene and necrosis, including part of the chronic apical periodontitis has occurred in the teeth, after the treatment of the pulp, the triamcinolone preparation of a dry pulp on the root canal mouth, the mountain slow and lasting Free formaldehyde gas control and eliminate root canal infection, inflammation of the root inflammation of the week organizations can also be controlled. Steps: (1) open pulp: technical and necrosis of the pulp chamber and root canal infection pulp. (2) with 3% hydrogen peroxide and saline flush