Patel S, Dawood A, Ford T Pitt, Whaites E
Endodontic Postgraduate Unit, Guy's, King's & St Thomas' Dental Institute, King's College, London, UK.
Int Endod J. 2007 Oct;40(10):818-30. doi: 10.1111/j.1365-2591.2007.01299.x. Epub 2007 Aug 14.
To provide core information on cone beam computed tomography (CBCT) technology and its potential applications in endodontic practice.
CBCT has been specifically designed to produce undistorted three-dimensional information of the maxillofacial skeleton as well as three-dimensional images of the teeth and their surrounding tissues. This is usually achieved with a substantially lower effective dose compared with conventional medical computed tomography (CT). Periapical disease may be detected sooner using CBCT compared with periapical views, and the true size, extent, nature and position of periapical and resorptive lesions can be assessed. Root fractures, root canal anatomy and the true nature of the alveolar bone topography around teeth may be assessed. CBCT scans are desirable to assess posterior teeth prior to periapical surgery, as the thickness of the cortical and cancellous bone can be accurately determined as can the inclination of roots in relation to the surrounding jaw. The relationship of anatomical structures such as the maxillary sinus and inferior dental nerve to the root apices may also be clearly visualized.
CBCT has a low effective dose in the same order of magnitude as conventional dental radiographs. CBCT has numerous potential applications in the management of endodontic problems.
提供关于锥形束计算机断层扫描（CBCT）技术及其在牙髓病治疗实践中潜在应用的核心信息。
CBCT经过专门设计，可生成颌面骨骼的无失真三维信息以及牙齿及其周围组织的三维图像。与传统医学计算机断层扫描（CT）相比，其有效剂量通常要低得多。与根尖片相比，使用CBCT可能更早发现根尖周疾病，并且可以评估根尖周和吸收性病变的真实大小、范围、性质和位置。可以评估根折、根管解剖结构以及牙齿周围牙槽骨形态的真实性质。在根尖周手术前，CBCT扫描有助于评估后牙，因为可以准确确定皮质骨和松质骨的厚度以及牙根相对于周围颌骨的倾斜度。上颌窦和下牙槽神经等解剖结构与根尖的关系也可以清晰显示。
CBCT的有效剂量较低，与传统牙科X线片处于同一数量级。CBCT在牙髓病问题的管理中有许多潜在应用。
