Nikneshan Sima, Abbas Fatemeh Mashhadi, Sabbagh Sedigheh
Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Indian J Dent Res. 2015 Jan-Feb;26(1):5-10. doi: 10.4103/0970-9290.156787.
Dental radiography is an important tool for detection of caries and digital radiography is the latest advancement in this regard. Spatial resolution is a characteristic of digital receptors used for describing the quality of images.
This study was aimed to compare the diagnostic accuracy of two digital radiographic systems with three different resolutions for detection of noncavitated proximal caries.
Diagnostic accuracy.
Seventy premolar teeth were mounted in 14 gypsum blocks. Digora; Optime and RVG Access were used for obtaining digital radiographs. Six observers evaluated the proximal surfaces in radiographs for each resolution in order to determine the depth of caries based on a 4-point scale. The teeth were then histologically sectioned, and the results of histologic analysis were considered as the gold standard. Data were entered using SPSS version 18 software and the Kruskal-Wallis test was used for data analysis. P <0.05 was considered as statistically significant.
No significant difference was found between different resolutions for detection of proximal caries (P > 0.05). RVG access system had the highest specificity (87.7%) and Digora; Optime at high resolution had the lowest specificity (84.2%). Furthermore, Digora; Optime had higher sensitivity for detection of caries exceeding outer half of enamel. Judgment of oral radiologists for detection of the depth of caries had higher reliability than that of restorative dentistry specialists.
The three resolutions of Digora; Optime and RVG access had similar accuracy in detection of noncavitated proximal caries.
牙科放射摄影是检测龋齿的重要工具，而数字放射摄影是这方面的最新进展。空间分辨率是用于描述图像质量的数字接收器的一个特性。
本研究旨在比较两种具有三种不同分辨率的数字放射成像系统检测非龋性邻面龋的诊断准确性。
诊断准确性。
将70颗前磨牙安装在14个石膏块中。使用Digora、Optime和RVG Access获取数字射线照片。六名观察者对每种分辨率的射线照片中的邻面进行评估，以便根据4分制确定龋齿深度。然后将牙齿进行组织学切片，并将组织学分析结果视为金标准。使用SPSS 18版软件录入数据，并使用Kruskal-Wallis检验进行数据分析。P<0.05被认为具有统计学意义。
在检测邻面龋时，不同分辨率之间未发现显著差异（P>0.05）。RVG Access系统具有最高的特异性（87.7%），而高分辨率的Digora、Optime的特异性最低（84.2%）。此外，Digora、Optime对检测超过釉质外半层的龋齿具有更高的敏感性。口腔放射科医生对龋齿深度的判断比修复牙科专家的判断具有更高的可靠性。
Digora、Optime和RVG Access的三种分辨率在检测非龋性邻面龋方面具有相似的准确性。
