Zhang M M, Liang Y H, Gao X J
Department of Cariology and Endodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Beijing Da Xue Xue Bao Yi Xue Ban. 2016 Jun 18;48(3):539-43.
To compare the assessments of the presence or absence and the changes of post-treatment periapical lesions using periapical radiographs versus cone-beam computed tomography (CBCT).
Imaging records were selected from a sample of 233 radiographic examinations (including periapical radiographs and CBCT) of patients with chronic apical periododontitis who received treatment and review in Department of Cariology and Endodontology of Peking University School of Stomatology. After testing the inter-observer and intra-observer agreement, two observers determined the presence or absence of a periapical lesion and classified the changes of lesions in 4 categories: absence, reduction or enlargement of lesion, or uncertain. The differences between CBCT and periapical radiographs in detecting the presence or absence and the changes of periapical lesions were compared using McNemar test and Fisher's exact test respectively.
In the study, 233 teeth were assessed with both periapical radiographs and CBCT images. Periapical lesions were detected in 178 teeth on CBCT scans and in 146 teeth on periapical radiographs. CBCT images revealed a significantly larger number of lesions than were revealed by periapical radiographs (P<0.01). There was disagreement on the changes of lesions between the two radiological technologies in 25% teeth, and the difference was statistically significant (P<0.01).
Significant differences were observed between periapical radiographs and CBCT in detection of post-treatment periapical lesions and assessment of the changes of periapical lesions.
比较根尖片与锥形束计算机断层扫描（CBCT）对治疗后根尖周病变有无及病变变化的评估。
从北京大学口腔医学院牙体牙髓科接受治疗及复查的233例慢性根尖周炎患者的影像学检查样本（包括根尖片和CBCT）中选取影像记录。在检验观察者间和观察者内一致性后，两名观察者确定根尖周病变的有无，并将病变变化分为4类：无、病变缩小或增大、或不确定。分别使用McNemar检验和Fisher精确检验比较CBCT与根尖片在检测根尖周病变有无及病变变化方面的差异。
本研究中，对233颗牙齿进行了根尖片和CBCT图像评估。CBCT扫描发现178颗牙齿有根尖周病变，根尖片发现146颗牙齿有根尖周病变。CBCT图像显示的病变数量明显多于根尖片（P<0.01）。两种影像学技术在25%的牙齿病变变化方面存在分歧，差异有统计学意义（P<0.01）。
根尖片与CBCT在治疗后根尖周病变的检测及根尖周病变变化的评估方面存在显著差异。
