老年人牙齿根管治疗术一次法的临床疗效初步观察口腔科欧龙１研究方法１．１适应症急慢性牙髓炎、牙髓坏死、坏疽、慢性根炎周炎，修复需要失治磨短的过长牙，可做覆盖义齿的无症状残根残冠。１．２治疗方法实验组为６０－７９岁患者５１例共８２颗患牙，应用碘仿氧化锌的... Dental root canal treatment of elderly primary efficacy of a preliminary observation Oral 1 research methods 1.1 Indications acute and chronic pulpitis, pulp necrosis, gangrene, chronic rhinitis, repair need to lose the short Long teeth, can do overdenture asymptomatic residual root residual crown. 1.2 Treatment of experimental group of patients aged 60-79 51 cases a total of 82 teeth, the application of iodoform zinc oxide ...