Methods: 216 teeth with acute pulpitis without previous treatment were divided into four groups at random, and the canal therapy was completed at one visit with different root canal filling materials.

• 方法:随机选择急性牙髓炎患者,共216颗患牙,以不同充填材料充填根管,一次性完成根管治疗,对病人进行随访观察疗效。