根管治疗术完成后根管系统冠根方的严密封闭可清除根管内绝大部分感染源,彻底切断感染途径,确保根管治疗术的远期疗效;而冠方和(或)根方封闭不良,病原微生物及其代谢产物可通过封闭材料与根管壁之间的微隙渗漏进入根尖周组织导致根管治疗术失败。本文就冠根方封闭效果与根管治疗术远期疗效的相关性,冠方与根方封闭的关系及其影响因素,根管封闭的研究方法等方面的研究现状作一综述。 Root canal therapy after the completion of root canal sealing system can close the root canal most of the infection source, completely cut off the infection, to ensure the long-term efficacy of root canal therapy; and crown and root (or root Bad seal, pathogenic microorganisms and their metabolites through the gap between the sealing material and the root canal wall leakage into the periapical tissue root canal therapy failed. This article summarizes the research status of the relationship between the coronary artery root closure effect and the long-term curative effect of root canal therapy, the relationship between coronary square root and root closure and its influencing factors, and the research methods of root canal occlusion.