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根管治疗是目前国内、外公认的牙髓及根尖周病最有效、彻底的治疗方法.提高根管治疗术的质量是提高患牙保存率的重要保证.影像检查是惟一能够记存的、贯穿根管治疗术始终的、直观的影像学资料.长期以来,临床常规使用的是根尖片.由于二维影像显示三维立体牙齿的局限,存在重叠、变形、失真等不准确现象锥形束CT以其低剂量照射、高分辨率、价格低廉、操作简单等诸多优势,被广泛应用于口腔临床的各个相关学科,并成为研究热点本文主要探讨锥形束CT在根管治疗诊疗计划中的临床应用,与根尖片比较了解其优势.

Application of cone beam CT and periapical film in root canal treatments

Cone beam CT （CBCT） has been widely applied in operative dentistry, and became high lights of scientific research, due to its advantages of low illumination dosage, high resolution, and reasonable price as well as simplicity to operate. Periapical radiography is an important assistant method in root canal treatment which secures the obturation quality of RCT. However, traditional two-dimensional radiography has many limitations in dealing with complex root canals; besides, it is also difficult for two-dimensional radiography to provide sufficient information about nearby important anatomical structures. CBCT has the three-dimensional reconstruction ability, which enables observations of target area in any required direction and in any anatomical layer. This property would be effective compensations to traditional two-dimensional radiography This article mainly focused on the clinical application of CBCT in root canal treatment.