Abstract：Objective: To evaluate clinical the effect of KHFS ZN nanomaterial as root canal filling in treating therapy resistant apical periodontits.Methods:Sixty cases of therapy resistant apical periodontitis were evenly divided into two groups with 30 cases in e
张海龙; 刘锦萍. KHFS-ZN纳米抗菌剂治疗难治性根尖周炎的疗效观察[J]. 南昌大学学报（医学版）, 2003, 45(01): 1-.
ZHANG Hai long, LIU Jin ping (Department of Stomatology, the Liuhua Hospital of Shenzhen,Shenzhen 518002,China). . , 2003, 45(01): 1-.
2003, Vol. 45 