Dabbaghi Arash, Sharifi Sanaz, Esmaeili Masoud
Department of Oral and Maxillofacial Radiology, School of Dental Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Front Dent. 2019 Nov-Dec;16(6):429-435. doi: 10.18502/fid.v16i6.3442. Epub 2019 Dec 20.
Cone-beam computed tomography (CBCT) is used in diagnostic situations, as well as tooth impaction and its complications. A possible sequela of tooth impaction is resorption of adjacent teeth, complicating the treatment plans. This study aimed to determine the diagnostic accuracy of high- and low-resolution CBCT scans in the detection of external root resorptions (ERRs), caused by an adjacent impacted tooth in the cementoenamel junction (CEJ), mid-root, and apical areas.
Forty-five intact single-rooted teeth were divided into three groups of 15. Each group was dedicated to each zone of the root. Slight, moderate, and severe ERRs were formed, and CBCT scans were taken before and after the formation of ERRs. The diagnostic accuracy was assessed, and the Proportion test was used to compare the results.
The statistical analyses of high- and low-resolution images showed a significant difference (P<0.05), which implies the higher accuracy of high-resolution images. The highest diagnostic accuracy among different zones was related to the mid-root, and the lowest was related to the apical zone. In terms of the size of ERRs, the diagnostic accuracy was the lowest for slight ERRs.
The most reliable and accurate diagnostic mode was found in high-resolution images, in the mid-root zone, and with severe ERRs. The lowest diagnostic accuracy was found in low-resolution images, in the apical zone, and with slight ERRs.
锥形束计算机断层扫描(CBCT)用于诊断情况以及牙齿阻生及其并发症。牙齿阻生的一个可能后遗症是邻牙吸收,这使治疗计划变得复杂。本研究旨在确定高分辨率和低分辨率CBCT扫描在检测由邻牙阻生导致的牙骨质牙釉质界(CEJ)、牙根中部和根尖区域的外源性牙根吸收(ERRs)方面的诊断准确性。
45颗完整的单根牙被分为三组,每组15颗。每组对应牙根的每个区域。形成轻度、中度和重度ERRs,并在ERRs形成前后进行CBCT扫描。评估诊断准确性,并使用比例检验比较结果。
高分辨率和低分辨率图像的统计分析显示出显著差异(P<0.05),这意味着高分辨率图像具有更高的准确性。不同区域中诊断准确性最高的是牙根中部,最低的是根尖区域。就ERRs的大小而言,轻度ERRs的诊断准确性最低。
在高分辨率图像、牙根中部区域以及重度ERRs情况下发现了最可靠和准确的诊断模式。在低分辨率图像、根尖区域以及轻度ERRs情况下发现了最低的诊断准确性。