Safi Yaser, Fazlyab Mahta, Asgary Saeed, Fazlalipour Maryam
Department of Radiology, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Iran Endod J. 2019 Winter;14(1):79-83. doi: 10.22037/iej.v14i1.21636.
In endodontics, metal artifacts are the major weak points of employing cone-beam computed tomography (CBCT) in teeth with metallic posts and restorations. The aim of this article is to introduce a novel technique for preparation of beneficial CBCT images of anterior teeth with metal posts and/or crowns. In this novel technique, the patient who was instructed to take CBCT images for reason of implant surgery, was asked to puff out his cheeks/lips during the rotation of x-ray tube. By comparing the image taken with this technique to normal image it was obvious that after applying the cheek puffing technique, the metal artifacts around restored anterior teeth significantly reduced. Then it seems that this novel technique removes the metal artifacts from the crowned teeth to distances far from the tooth structure and enables more accurate diagnosis.
在牙髓病学中，金属伪影是在有金属桩和修复体的牙齿中使用锥形束计算机断层扫描（CBCT）的主要薄弱点。本文的目的是介绍一种为有金属桩和/或牙冠的前牙制备有益CBCT图像的新技术。在这项新技术中，因种植手术而被要求进行CBCT成像的患者，被要求在X射线管旋转期间鼓起脸颊/嘴唇。通过将用该技术拍摄的图像与正常图像进行比较，很明显在应用脸颊鼓起技术后，修复前牙周围的金属伪影显著减少。那么似乎这项新技术将带冠牙齿的金属伪影消除到远离牙齿结构的距离，并能实现更准确的诊断。
