Yagiz A, Ünsal G
Istanbul University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul, Turkey.
Near East University, Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Nicosia, Cyprus.
J Stomatol Oral Maxillofac Surg. 2021 Feb;122(1):112-114. doi: 10.1016/j.jormas.2020.05.007. Epub 2020 May 19.
Ghost images are artefacts of anatomical structures or foreign objects that oral and maxillofacial surgeons should take into consideration to prevent misdiagnosis and mistreatment. A 38-year-old male patient referred to our clinic for dental implant treatment. Orthopantomograph (OPG) revealed an impacted distomolar at the apex of maxillary right third molar and an ectopic supernumerary tooth in the left maxillary sinus. Despite the ectopic supernumerary tooth appearance on OPG, cone beam computed tomography images revealed that there was not a supernumerary tooth in the left maxillary sinus. Nasal cavity and paranasal sinuses in field of view were evaluated and maxillary ostium diameters were measured to detect if the tooth had migrated. The tooth appearance on the OPG was determined as a ghost image of the impacted distomolar at the contralateral side. Following the extraction of the distomolar, another OPG was performed and the ghost image was disappeared.
影像重影是口腔颌面外科医生在预防误诊和误治时应考虑的解剖结构或异物的伪影。一名38岁男性患者因牙种植治疗前来我院就诊。全景曲面断层片（OPG）显示上颌右侧第三磨牙根尖处有一颗阻生远中磨牙，左上颌窦内有一颗异位多生牙。尽管OPG上显示有异位多生牙，但锥形束计算机断层扫描图像显示左上颌窦内并无多生牙。对视野中的鼻腔和鼻窦进行了评估，并测量了上颌窦口直径，以检测牙齿是否发生了移位。OPG上的牙齿影像被确定为对侧阻生远中磨牙的影像重影。拔除远中磨牙后，再次拍摄OPG，影像重影消失。
