Mahmoudi Elham, Madani Zahrasadat, Moudi Ehsan, Bijani Ali, Hashemian Mohammad Bagher, Solati Sanaz
Dental Materials Research Center, Health research institute, Babol University of Medical Sciences, Babol, Iran.
Oral Health Research Center, Health research institute, Babol University of Medical Sciences, Babol, Iran.
Iran Endod J. 2019 Summer;14(3):211-215. doi: 10.22037/iej.v14i3.25005.
The purpose of this study was to compare the high resolution cone-beam computed tomography (CBCT) and standard mode CBCT diagnostic accuracy in internal root resorption with different sites and sizes.
Eighty single rooted human teeth with visible pulps in periapical radiography were split mesiodistally along the coronal plane. Internal resorption like lesions were created in three areas (cervical, middle and apical) in labial wall of the canals in different diameters. High resolution CBCT (CBCT-H) and standard mode CBCT (CBCT-C) were taken from each tooth. Two observers examined the high resolution CBCT and standard mode CBCT to evaluate the presence of resorption cavities. The data were statistically analyzed and degree of agreement was calculated using Cohen's kappa (k) values. Data were analyzed by SPSS 20 software and sensitivity, specificity and positive and negative predictive value for both methods were calculated. Data were analyzed using the Mac-Nemar and chi-square tests.
The positive predictive value and negative predictive value in CBCT-H was higher than that of CBCT-C, all of which indicates that the CBCT-H diagnostic test is more sensitive and more accurate than CBCT-C. Kappa statistics showed that there is a strong and complete agreement between the CBCT high resolution and reality (kappa: 0.72) and in the Standard CBCT method, a moderate agreement has been obtained with reality (Kappa: 0.45).
According to our study CBCT high resolution has a higher diagnostic accuracy than conventional CBCT.
本研究的目的是比较高分辨率锥形束计算机断层扫描（CBCT）和标准模式CBCT对不同部位和大小的牙根内吸收的诊断准确性。
选取80颗在根尖片上可见牙髓的单根人牙，沿冠状面近远中向劈开。在根管唇壁的三个区域（颈部、中部和根尖部）制造不同直径的类似牙根内吸收的病变。对每颗牙齿进行高分辨率CBCT（CBCT-H）和标准模式CBCT（CBCT-C）扫描。两名观察者检查高分辨率CBCT和标准模式CBCT，以评估吸收腔的存在情况。对数据进行统计学分析，并使用科恩kappa（k）值计算一致性程度。数据采用SPSS 20软件进行分析，计算两种方法的敏感性、特异性以及阳性和阴性预测值。使用麦克尼马尔检验和卡方检验对数据进行分析。
CBCT-H的阳性预测值和阴性预测值高于CBCT-C，所有这些表明CBCT-H诊断测试比CBCT-C更敏感、更准确。kappa统计显示，CBCT高分辨率与实际情况之间存在强且完全的一致性（kappa：0.72），在标准CBCT方法中，与实际情况获得了中等程度的一致性（kappa：0.45）。
根据我们的研究，高分辨率CBCT比传统CBCT具有更高的诊断准确性。
