干髓疗法治疗牙髓病已有一百多年历史,但使用液氮治疗牙髓病报道很少,为了提高干髓法疗效,最近我们使用自制简易液氮冷冻器一次干髓法,治疗牙髓病102例,经过顺利,疗程缩短,疗效满意,介绍如下:手术方法和疗效一、适应症1.慢性增生性牙髓炎,慢性溃疡性牙髓炎。2.急性浆液性牙髓炎髓切断术失败者。3.意外穿髓不宜保留活髓的后牙。二、冷冻器设置自制简易冷冻器装置是采用半磅温瓶一只,橡皮塞作为温瓶盖,在盖上作二个0.2cm大小的园孔。以一根直径1.5cm,长25cm的金属管弯成90度角,在其两头各焊接一直径0.2cm,长20cm的金属细管。将所焊细管的一头插入温并橡皮塞的小孔,使 Dry pulp therapy of pulp disease has been a hundred years of history, but the use of liquid nitrogen treatment of endodontic rarely reported, in order to improve the effectiveness of dry pulp method, we recently used homemade simple liquid nitrogen freezer dry method, the treatment of teeth Myelopathy 102 cases, after a smooth, short course of treatment, the effect is satisfactory, described as follows: surgical methods and efficacy of a, Indications 1. Chronic proliferative pulpitis, chronic ulcerative pulpitis. 2. Acute serous pulp failure in patients with pulpotomy. Accidental insertion of the pulp should not be retained after the pulp of the posterior teeth. Second, the freezer set Homemade freezer device is a half-pound warm bottle, rubber stopper as a warm bottle cap, cover for two 0.2cm size garden hole. To a diameter of 1.5cm, 25cm long metal tube bent into a 90-degree angle, the two ends of each welded a diameter of 0.2cm, 20cm long metal tube. One end of the welded tube will be inserted into the hole in the temperature of the rubber plug