应用超声波处理细小及堵塞根管（附70例报道）

Treating the fine canals and obstructed canals with ultrasound in 70 cases

用超声波对７０例细小及堵塞根管进行根管治疗，经根管再扩大并进行根管充填６１例，成功率８７．１％，且未发生根管侧穿和牙折，说明这一方法较传统方法更为有效和安全。

The fine canals and obstructed canals were treated with ultrasound in 70 cases.Canals were re-enlarged and filled in 61 cases, with a succss rate of 89%. No lateral perforation or tooth facture was due to excessive loss of the teeth structure. This method was proved to be more effective and safer than traditional method.