Objective: To investigate the effect of single-visit root canal treatment (RCT) on teeth with chronic apical periodontitis using contemporary technique of canal cleaning, shaping and obturation.

目的：评价慢性根尖周炎一次性根管治疗的临床效果和可靠性。

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Apexification is a technique to induce a calcified barrier in a root with an open apex or the continued apical development of an incomplete root in young permanent teeth through some special material.

根尖诱导形成术是用药物诱导牙根尚未发育完成的年轻恒牙的根尖继续发育或形成钙化屏障的技术。

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The effect of root irrigation on removing canal debris and the variance of apical foramen pressure on extracted teeth were compared between the conventional irrigation and CANS irrigation.

并比较了该方法与常规方法对离体牙进行根管清洗时，根管内碎屑清洗的效果和根尖孔的压力变化。

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