Nair M K, Tyndall D A, Ludlow J B, May K, Ye F
Department of Diagnostic Sciences, School of Dentistry, University of North Carolina at Chapel Hill, USA.
Dentomaxillofac Radiol. 1998 Mar;27(2):80-4. doi: 10.1038/sj/dmfr/4600323.
To explore the effects of restorative material and lesion location on the detection of recurrent caries using intra-oral film, direct digital radiography and unprocessed and iteratively restored tuned aperture computed tomography (TACT) images.
An in vitro model with simulated lesions in half the surfaces studied was used. Lesions of varying sizes were created at either the intersection of the facial or lingual wall and the gingival floor or on the gingival floor midway between the facial and lingual walls in the proximal boxes of 24 molar teeth with MOD inlay preparations that had been restored with amalgam, radiopaque composite or radiolucent composite.
Sensitivity and specificity values based on restoration were: amalgam: 59 and 87%; radiopaque composite: 68 and 78%; radiolucent composite: 36 and 93%; based on lesion location, mid-cervical floor region: 51 and 97%; point angle region: 44 and 90%; based on imaging modality, film: 40 and 85%; digital: 44 and 76%; unprocessed TACT slices: 50 and 87%, iteratively restored TACT images: 83 and 96%. Iteratively restored TACT images had the best intra- and inter-reader agreement.
The use of restorative materials with a density approximating that of enamel is more effective for the detection of recurrent caries. Lesions located at the buccal point angle or mid-gingival floor are more easily detected than at the lingual point angle region. The sensitivity and specificity of TACT and iteratively restored TACT images were superior to those of film and direct digital images.
探讨修复材料和病变位置对使用口腔内胶片、直接数字化放射成像以及未处理和迭代恢复的调孔计算机断层扫描（TACT）图像检测复发性龋齿的影响。
使用一个体外模型，在所研究表面的一半创建模拟病变。在24颗有MOD嵌体修复体且已用汞合金、不透射线复合材料或透射线复合材料修复的磨牙近中盒中，在颊壁或舌壁与龈底的交界处或在颊壁和舌壁之间龈底的中点处创建不同大小的病变。
基于修复材料的敏感度和特异度值分别为：汞合金：59%和87%；不透射线复合材料：68%和78%；透射线复合材料：36%和93%；基于病变位置，颈中龈底区域：51%和97%；点角区域：44%和90%；基于成像方式，胶片：40%和85%；数字化：44%和76%；未处理的TACT切片：50%和87%，迭代恢复的TACT图像：83%和96%。迭代恢复的TACT图像在阅片者内和阅片者间一致性最佳。
使用密度接近牙釉质的修复材料对检测复发性龋齿更有效。位于颊面点角或龈中底部的病变比舌面点角区域的病变更容易检测到。TACT及迭代恢复的TACT图像的敏感度和特异度优于胶片和直接数字化图像。
