使用锥形束计算机断层扫描机检测根管治疗后牙齿根折的基础图像数量的影响：一项体外研究。
Number of basis images effect on detection of root fractures in endodontically treated teeth using a cone beam computed tomography machine: an in vitro study.
机构信息
Oral and Maxillofacial Radiology, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 May;115(5):676-81. doi: 10.1016/j.oooo.2013.01.026.
OBJECTIVES
The objective of this study was to compare the accuracy of root fracture detection in endodontically treated teeth using scans acquired with a 180° rotation motion compared with a 360° after which the patient exposure and number of basis images are doubled.
METHODS
Sixty-six roots were collected and decoronated. All were treated endodontically. One-half of the roots were fractured, resulting in 2 root fragments which were then glued together. The roots were placed randomly in 8 prepared beef rib fragments. Five reviewers independently reviewed the scans twice, at different times.
RESULTS
The specificity of the 360° scan was significantly higher than the 180° scan; doubling the basis images leads to a significant decrease in false-positive rates. Accuracy and sensitivity were not significantly different.
CONCLUSIONS
Only the specificity is improved by the increased rotation and doubling of images. The accuracy and sensitivity are not improved.
目的
本研究旨在比较使用 180°旋转运动获取的扫描图像与 360°旋转运动获取的扫描图像检测根管治疗后牙齿根折的准确性，后者会使患者的辐射暴露量和基础图像数量增加一倍。
方法
收集并截冠 66 个牙根。所有牙根均接受根管治疗。一半的牙根发生骨折，形成 2 个根段，然后将其粘在一起。将牙根随机放置在 8 个准备好的牛肋骨碎片中。5 位评审员在不同时间两次独立对扫描结果进行了评估。
结果
360°扫描的特异性明显高于 180°扫描；将基础图像数量增加一倍可显著降低假阳性率。准确性和敏感性无显著差异。
结论
仅增加旋转角度和图像数量可提高特异性。准确性和敏感性没有提高。
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