Detection of marginal defects of composite restorations with conventional and digital radiographs
Detection of marginal defects of composite restorations with conventional and digital radiographs
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DOI：
10.1034/j.1600-0722.2002.21271.x
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发表时间：
2002-08-01
影响因子：
1.9
通讯作者：
Noack, MJ
中科院分区：
文献类型：
--
作者：
Haak, R;Wicht, MJ;Noack, MJ
本研究的目的是确定使用三种口内放射系统在体外检测复合填料的接近缺陷的有效性。对具有三种不透射线性（264、306、443% Al 99.5）的II类复合树脂牙本质（108个）（其中27个分别具有边缘开口或突出）进行常规（Ektaspeed plus）和数字（Dexis、迪戈拉）射线照相。由10名观察员对图像进行评估，以确定是否存在边缘间隙和突出，以及是否需要根据5分置信度评级量表进行修复治疗。观察的有效性表示为受试者工作特征（ROC）曲线下面积（A（ROC））。重复测量的方差分析显示显着影响的“放射系统”和“诊断目的”。边缘突出（A（roc）= 0.90）比开口（A（roc）= 0.63）更容易诊断。边缘间隙在常规和Dexis X线片上比在迪戈拉图像上更好地检测到。治疗决策的敏感性和特异性范围分别为0.53-0.56和0.87-0.88。结果表明，射线照相检测复合树脂涂层边缘缺陷的有效性仅受所用射线照相系统的轻微影响。边缘差距的诊断往往导致假阳性和假阴性的决定。
The purpose of this study was to determine the validity of detecting approximal imperfections of composite fillings using three intraoral radiographic systems in vitro . Class II composite resin restorations (108) with three radiopacities (264, 306, 443% Al 99.5) of which 27 had marginal openings or overhangs, respectively, were conventionally (Ektaspeed plus) and digitally (Dexis, Digora) radiographed. Images were assessed by 10 observers for the presence of marginal gaps and overhangs, as well as for their need of restorative treatment according to a five-point confidence rating scale. The validity of the observations were expressed as areas under receiver operating characteristic (ROC) curves (A(roc)). Repeated measures analysis of variance revealed significant effects of 'radiographic system' and 'diagnostic purpose'. Marginal overhangs (A(roc) = 0.90) were significantly easier to diagnose than openings (A(roc) = 0.63). Marginal gaps were better detected on conventional and Dexis radiographs than on Digora images. the range of sensitivities and specificities of the treatment decision was 0.53-0.56 and 0.87-0.88, respectively. It was concluded that the validity of detecting marginal defects of composite resin restorations based on radiographs was only slightly affected by the radiographic system being used. The diagnosis of marginal gaps frequently resulted in false-positive and false-negative decisions.