Rudolphy M P, Gorter Y, van Loveren C, van Amerongen J P
Department of Cariology and Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), The Netherlands.
Caries Res. 1997;31(1):24-9. doi: 10.1159/000262369.
In the present in vitro study, the validity was determined of bite-wing radiographs for the diagnosis of secondary caries in approximal parts of teeth with class II amalgam restorations in vitro. The study was performed on 47 molars and 49 premolars providing 68 and 69 filled approximal surfaces, respectively. The teeth were radiographed in a buccolingual direction to obtain images comparable to bite-wings. Radiolucencies and radio-opacities were scored as caries. Subsequently the teeth were sectioned (700 microns) in transverse or sagittal direction and then the sections were radiographed. Validation was performed against these radiographs of sections, on which also radiolucencies and radio-opacities were scored. Statistical analysis of the results revealed significant differences between the validity parameters for molars and premolars, being for sensitivity 73 and 80%, respectively, for specificity 90 and 95%, for positive predictive value 95 and 92%, and for negative predictive value 58 and 86%. For molars, the results did not differ significantly from the results of our previous study on caries diagnosis in teeth with occlusal fillings. The present experiment showed that bite-wing radiographs are useful for the diagnosis of secondary caries under approximal parts of class II amalgam restorations, just as for secondary caries diagnosis adjacent to class I restorations.
在本体外研究中，对咬合翼片用于体外诊断Ⅱ类银汞合金修复牙邻面继发龋的有效性进行了测定。该研究对47颗磨牙和49颗前磨牙进行，分别提供了68个和69个充填邻面。将牙齿沿颊舌向进行X线摄影，以获得与咬合翼片类似的图像。将透射区和阻射区计为龋损。随后将牙齿沿横向或矢状向切成700微米厚的切片，然后对切片进行X线摄影。对照这些切片的X线片进行验证，同样对透射区和阻射区进行计分。结果的统计分析显示，磨牙和前磨牙的有效性参数之间存在显著差异，敏感性分别为73%和80%，特异性分别为90%和95%，阳性预测值分别为95%和92%，阴性预测值分别为58%和86%。对于磨牙，结果与我们之前关于咬合面充填牙龋病诊断的研究结果无显著差异。本实验表明，咬合翼片对于诊断Ⅱ类银汞合金修复体邻面下方的继发龋是有用的，就如同对Ⅰ类修复体相邻部位的继发龋诊断一样。
