Primary teeth; Root canal therapy; Root canal filling material.

乳牙；根管治疗；根管充填材料。

Suture or epidural anesthesia catheter was used as the filling material.

采用缝线或硬膜外麻醉导管作为泪小管留置物。

Foaming resin is a kind of new seal-filling material used in mine safety.

泡沫树脂是一种新型安全填充密闭材料。

DO online testing: By rotation speed, filling material for linkage control.

DO在线检测：可通过转速、补料等进行联动控制。

Objective To study the sealing ability of Gallium Alloy as a root end filling material.

目的研究根尖倒封闭材料镓合金的密封性能。