摘要口腔颌面锥形束CT（CBCT）近年来被广泛应用于疑难牙体牙髓病的临床诊疗。为促进CBCT在疑难牙体牙髓病诊疗领域的合理应用，本文介绍了牙体牙髓病影像学检查的诊断可接受、并基于适应证及患者具体情况进行剂量优化（ALADAIP）原则；对CBCT用于根管解剖形态变异、牙内陷畸形、牙髓钙化、牙源性上颌窦炎、牙根折裂、根尖周病变及根管治疗后疼痛的影像学评估要点，以及如何辩证看待CBCT评估根管解剖形态、牙髓钙化和隐裂牙进行总结和讨论；并阐明针对疑难牙体牙髓病的CBCT拍摄与图像重建的注意事项，以期为口腔医师更好地应用CBCT诊断疑难牙体牙髓病提供参考。

abstractsCone beam CT (CBCT) has been widely used in endodontics in recent years. To promote the rational and effective application of CBCT in endodontics, this article introduces the principle of "As low as diagnostically acceptable being indication-oriented and patient-specific (ALADAIP)" for radiographic examination in endodontics. It summarizes and discusses key points of CBCT images evaluation in root canal anatomical variations, dens invaginatus, pulp calcification, odontogenic maxillary sinusitis, root fractures, periapical lesions, and post-endodontic treatment pain. Additionally, it explores how to dialectically use CBCT in evaluating root canal anatomical variations, pulp calcification and cracked tooth, and finally gives some tips about the scanning and three-dimensional reconstruction of CBCT in endodontics.