Department of Dentoalveolar Surgery, Implantology and Radiology, Dental School of the Aristotle University of Thessaloniki, Thessaloniki, Greece.
Odontology. 2013 Jan;101(1):89-95. doi: 10.1007/s10266-012-0059-0. Epub 2012 Jan 15.
This study compared the diagnostic accuracy of digital radiographic images with conventional radiographs for the detection of experimentally induced root fractures. Horizontal fractures were induced by a mechanical force to the root of 15 single rooted teeth. Vertical fractures were induced in 15 single rooted teeth and 15 molars, respectively, by disk cutting. The teeth were mounted in dried mandibles and were radiographed with the parallel technique using a CCD-based Planmeca imaging system and F-speed films. Seven observers recorded their findings and then 2 pairs of them examined the same images together. Az values expressed the diagnostic accuracy of the imaging systems and the degree of agreement was estimated using the Cohen's kappa statistic. The areas under the ROC curves (Az) in single rooted teeth were 0.61 for conventional radiography and 0.64 for digital radiography. Digital imaging system did not perform significantly better than conventional one (p > 0.01). Digital radiographs (Az: 0.72) provided higher detection accuracy in molars than conventional images (Az: 0.51) (p = 0.0102). The digital images scored higher kappa values with narrower range than conventional. Observers in pairs did not perform significantly better than individually. The results were not affected by the observers but were affected by the cases (p < 0.001). Digital images were equivalent to F-speed films for the detection of root fractures in single rooted teeth. The digital system performed significantly better than the conventional in detecting root fractures in molars.
本研究比较了数字射线照相图像与传统射线照相在检测实验诱导根折中的诊断准确性。通过向 15 颗单根牙的牙根施加机械力来诱导水平骨折。通过盘切割分别在 15 颗单根牙和 15 颗磨牙中诱导垂直骨折。将牙齿安装在干燥的下颌骨上，并使用基于 CCD 的 Planmeca 成像系统和 F 速度胶片以平行技术进行放射照相。7 名观察者记录了他们的发现，然后其中 2 对观察者一起检查了相同的图像。Az 值表示成像系统的诊断准确性，并用 Cohen 的 kappa 统计估计了一致性程度。在单根牙中，传统射线照相的 Az 值为 0.61，数字射线照相为 0.64。数字成像系统的性能并不明显优于传统系统（p>0.01）。数字射线照相（Az：0.72）在检测磨牙中的根折比传统图像（Az：0.51）具有更高的准确性（p=0.0102）。数字图像的 kappa 值评分较高，范围较窄。成对的观察者并不比单独的观察者表现得更好。结果不受观察者影响，但受病例影响（p<0.001）。数字图像在检测单根牙根折方面与 F 速度胶片相当。数字系统在检测磨牙根折方面的性能明显优于传统系统。
