Methods 90 cases were divided into five groups randomly, group A,B,C and D were experimental groups and Vitapex was used, root canals of the four groups were filled in the folloming ways respectively: group A, once with gutta percha point;
Methods 90 cases were divided into five groups randomly, group A,B,C and D were experimental groups and Vitapex was used, root canals of the four groups were filled in the folloming ways respectively: group A, once with gutta percha point;
方法 将 90例慢性根尖周炎随机分为 组 ,A、B、C、D为实验组 ,使用Vitapex糊剂 ,分别用下列方法进行根充 :A组 ,一次法 ,加牙胶尖 ;