Nummikoski P V, Martinez T S, Matteson S R, McDavid W D, Dove S B
University of Texas Health Science Center at San Antonio.
Dentomaxillofac Radiol. 1992 May;21(2):59-64. doi: 10.1259/dmfr.21.2.1397457.
The diagnostic accuracy of digital subtraction radiography in detection of artificial recurrent caries lesions was assessed in this project. The use of digital subtraction radiography has been shown to markedly increase the accuracy of the detection of destruction in the periodontal bone, but the method has not been evaluated in secondary caries detection. Defects of three different sizes, simulating recurrent caries, were sequentially prepared in the interproximal cavity preparation margins of 28 teeth. Two composite restorative materials with different radiographic densities were used as posterior restorations, and a radiograph was obtained of each defect size and restorative material. The radiographs were digitized and subtracted from the reference images, and the conventional radiographs and the subtraction images were evaluated by seven observers. The data were analysed with ROC statistics. Subtraction radiography was found to be superior to conventional radiography in recurrent caries detection, mainly by reducing the false-positive diagnoses. The radiopacity of the restorative material had a significant effect on accuracy with conventional but not with subtraction radiography.
本项目评估了数字减影放射成像在检测人工复发性龋损方面的诊断准确性。数字减影放射成像已被证明能显著提高牙周骨破坏检测的准确性，但该方法尚未在继发龋检测中得到评估。在28颗牙齿的邻面洞制备边缘依次制备三种不同大小的模拟复发性龋的缺损。使用两种具有不同放射密度的复合修复材料作为后牙修复体，对每种缺损大小和修复材料都拍摄了一张X光片。将X光片数字化并与参考图像相减，由七名观察者对传统X光片和减影图像进行评估。数据采用ROC统计分析。结果发现，减影放射成像在复发性龋检测方面优于传统放射成像，主要是通过减少假阳性诊断。修复材料的不透射线性对传统放射成像的准确性有显著影响，但对减影放射成像没有影响。
