Efficacy of Continuous Chelation With Etidronate And Sequential Chelation With Chitosan On Bacterial Reduction In Teeth With Pulp Necrosis: A Double-Blind, Randomized Clinical Trial

依替膦酸钠连续螯合联合壳聚糖序贯螯合治疗对牙髓坏死牙齿细菌减少效果的双盲随机临床试验