Department of Oral and Maxillofacial Radiology, Dental Implants Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Iran.
Department of Periodontics, Dental Implants Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Iran.
Dent Med Probl. 2020 Jul-Sep;57(3):269-273. doi: 10.17219/dmp/118749.
Periodontal disease has a high prevalence in many countries. Thus, the early detection of periodontal disease is important in order to obtain the most appropriate treatment plan to prevent tooth loss, and subsequently, to maintain the patient's general health.
The aim of this study was to compare the accuracy of cone-beam computed tomography (CBCT) and intraoral parallel digital radiography in measuring the dimensions of periodontal bone defects.
In this in vitro study, 236 periodontal bone defects were artificially created in dry human mandibles using a burr. Defects included horizontal, one-, two-, and three-wall defects, craters, dehiscences, and fenestrations. Intraoral digital radiographs were obtained using the parallel technique with photostimulable phosphor plates (PSP) and CBCT scans were performed. Two calibrated observers evaluated the images and measured the dimensions of the defects. Clinical probing was performed and considered as the gold standard. The measurements of digital radiography and CBCT were compared to those achieved by probing to evaluate their accuracy.
Cone-beam computed tomography had a significantly stronger correlation with the gold standard than intraoral parallel digital imaging. In the total assessment of the periodontal defects, the intraclass correlation coefficient (ICC) was calculated at 0.93 for CBCT-probe and at 0.78 for PSP-probe (p < 0.05).
The accuracy of CBCT was superior to that of intraoral digital radiography for measuring horizontal, one-, two-, and three-wall defects, craters, dehiscences, and fenestrations.
牙周病在许多国家的发病率都很高。因此，早期发现牙周病对于获得最合适的治疗方案以预防牙齿丧失，进而维持患者的整体健康非常重要。
本研究旨在比较锥形束 CT（CBCT）和口内平行数字放射摄影术在测量牙周骨缺损尺寸方面的准确性。
在这项体外研究中，使用钻头在干燥的人类下颌骨上人为创建了 236 个牙周骨缺损。缺损包括水平、一壁、两壁、三壁缺损、火山口、裂隙和开窗。使用光激励磷光体平板（PSP）进行口内数字放射摄影术，获得平行技术的数字放射照片，并进行 CBCT 扫描。两名经过校准的观察者评估图像并测量缺损的尺寸。临床探查被认为是金标准，并将其与数字放射摄影和 CBCT 的测量值进行比较，以评估其准确性。
CBCT 与金标准的相关性明显强于口内平行数字成像。在牙周缺损的总体评估中，CBCT 与探针的组内相关系数（ICC）为 0.93，PSP 与探针的 ICC 为 0.78（p<0.05）。
在测量水平、一壁、两壁、三壁缺损、火山口、裂隙和开窗方面，CBCT 的准确性优于口内数字放射摄影术。
