Methods To fill the root canal of the primary teeth using two different materials,one group was filled with Vitaphone paste and the other was filled with ZOE paste,with visit for one year.

• 方法用两种根管充填材料对乳磨牙进行根管充填,实验组用比塔派克斯糊剂进行根管充填,对照组用氧化锌丁香油糊剂根管充填,并随访1年。