Gupta Jyoti, Ali Syed Parveez
Department of Oral Medicine and Radiology, KIMSU School of Dental Sciences, Karad, Maharashtra, India.
Natl J Maxillofac Surg. 2013 Jan;4(1):2-6. doi: 10.4103/0975-5950.117811.
Cone beam computed tomography (CBCT) scanners for the oral and maxillofacial region were pioneered in the late 1990s independently by Arai et al. in Japan and Mozzo et al. CBCT has a lower dose of radiation, minimal metal artifacts, reduced costs, easier accessibility, and easier handling than multislice computed tomography (MSCT); however, the latter is still considered a better choice for the analysis of bone density using a Hounsfield unit (HU) scale. Oral implants require localized area of oral and maxillofacial area for radiation exposure; so, CBCT is an ideal choice. CBCT scans help in the planning of oral implants; they enable measurement of the distance between the alveolar crest and mandibular canal to avoid impingement of inferior alveolar nerve, avoid perforation of the mandibular posterior lingual undercut, and assess the density and quality of bone, and help in planning of the oral implant in the maxilla with special attention to the nasopalatine canal and maxillary sinus. Hence, CBCT reduces the overall exposure to radiation.
用于口腔颌面区域的锥形束计算机断层扫描（CBCT）扫描仪是在20世纪90年代末由日本的新井等人和莫佐等人分别独立开创的。与多层螺旋计算机断层扫描（MSCT）相比，CBCT的辐射剂量更低、金属伪影最少、成本降低、更容易获取且操作更简便；然而，后者在使用亨氏单位（HU）量表分析骨密度方面仍被认为是更好的选择。口腔种植需要对口腔颌面区域的局部进行辐射暴露；因此，CBCT是理想的选择。CBCT扫描有助于口腔种植的规划；它们能够测量牙槽嵴与下颌管之间的距离，以避免下牙槽神经受到压迫，避免下颌后舌侧倒凹穿孔，并评估骨密度和质量，还有助于上颌口腔种植的规划，尤其要关注鼻腭管和上颌窦。因此，CBCT减少了总体辐射暴露。
