The older of the patient,the lower of the effectiveness.Conclusion:Filling the channel of chronic apical periodontic with the paste of spiramycin amel tinidazol can ch...

• 结论:替硝唑螺旋霉素药物糊剂根充治疗慢性根尖周炎缩短了疗程和患者的就诊次数,疗效可靠。