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。
Their construction involved the careful deconstruction of the seized up and rusted machine before cleaning, shaping and welding each component into place to create a contemporary and intracate form.
它们的建造包括将这个停止不用、生锈的机器仔细地分解，然后清洗、塑型、再将各个部分焊接起来创造成错综复杂的现代形式。
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