This is a review about the relationship between complete obturation and the long term success of root canal treatment, and the influenced factors of apical sealing and coronal restorations.

• 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。