Vaarkamp J, ten Bosch J, Verdonschot E H, Huysmans M C
Department of Cariology and Endodontology, Faculty of Medical Sciences, University of Nijmegen, The Netherlands.
Caries Res. 1997;31(3):232-7. doi: 10.1159/000262405.
The mere detection of caries lesions is insufficient for optimal treatment decision-making. Hence, the aim of this study was to investigate whether quantitative information about approximal lesion depth can be obtained from a technique based on the wavelength dependency of light propagation and additional use of a dye. Another aim was to compare the diagnostic performance of the optical technique and bitewing radiography. Measurements were performed on 33 extracted premolar teeth. Twelve proximal surfaces had white-spot, and 17 had discoloured small lesions. Four surfaces were sound. The teeth were transilluminated with a single glass fibre at the approximal surface before and after dye application. The occlusal surface was imaged with a CCD camera. Light in the blue and red part of the electromagnetic spectrum was selected using Schott glass filters. Average decadic optical thickness differences, delta bl-rd tau eff, were estimated and plotted as a function of normalised lesion depth, dhist, established from histological validation by two observers. The Spearman rank correlation was rs (delta bl-rd tau eff, dhist) = 0.87 (95% confidence interval, CI: 0.74-0.94). A marked increase in average decadic optical thickness in the blue part of the electromagnetic spectrum, delta dye tau eff, was observed for those lesion that, upon direct visual inspection of the approximal surface, clearly showed dye uptake. Bitewing radiographic depth ratings of two observers were plotted as a function of dhist. The correlations were rs (dRA,1, dhist) = 0.62 (95% CI: 0.34-0.80), rs (dRA,2, dhist) = 0.75 (95% CI: 0.54-0.87), and between the observers rs (dRA,1, dRA,2) = 0.44 (95% CI: 0.10-0.69). The p values of rs (delta bl-rd tau eff, dhist) -rs (dRA1,1, dhist) and rs (delta bl-rd tau eff, dhist) -rs (dRA,2, dhist) were p1 = 0.01 and p2 = 0.08, respectively. It was concluded that quantitative information about lesion depth can be obtained optically. The dye penetrates into only a limited number of caries lesions, in which cases dye uptake is detectable in transillumination geometry. Under laboratory circumstances the optical technique performs as well as bitewing radiography in the diagnosis of small approximal caries lesions.
仅检测到龋损对于做出最佳治疗决策是不够的。因此，本研究的目的是调查是否可以从基于光传播的波长依赖性及额外使用染料的技术中获取邻面龋损深度的定量信息。另一个目的是比较光学技术和咬合翼片X线摄影的诊断性能。对33颗拔除的前磨牙进行了测量。12个邻面有白斑，17个有变色的小龋损。4个表面正常。在应用染料前后，用单根玻璃纤维在邻面进行透照。用CCD相机对咬合面进行成像。使用肖特玻璃滤光片选择电磁光谱中蓝色和红色部分的光。估计平均常用对数光学厚度差，即δbl-rdτeff，并将其绘制为与归一化龋损深度dhist的函数关系图，dhist由两名观察者通过组织学验证确定。斯皮尔曼等级相关性为rs（δbl-rdτeff，dhist）=0.87（95%置信区间，CI：0.74-0.94）。对于那些在直接目视检查邻面时明显显示有染料摄取的龋损，观察到电磁光谱蓝色部分的平均常用对数光学厚度有显著增加，即δdyeτeff。两名观察者的咬合翼片X线摄影深度评级绘制为dhist的函数关系图。相关性分别为rs（dRA,1，dhist）=0.62（95%CI：0.34-0.80）；rs（dRA,2，dhist）=0.75（95%CI：0.54-0.87），观察者之间的相关性为rs（dRA,1，dRA,2）=0.44（95%CI：0.10-0.69）。rs（δbl-rdτeff，dhist）-rs（dRA1,1，dhist）和rs（δbl-rdτeff，dhist）-rs（dRA,2，dhist）的p值分别为p1 = 0.01和p2 = 0.08。得出的结论是，可以通过光学方法获得龋损深度的定量信息。染料仅渗入有限数量的龋损中，在这些情况下，在透照几何条件下可检测到染料摄取。在实验室条件下，光学技术在诊断小的邻面龋损方面与咬合翼片X线摄影表现相当。
Dtsch Zahn Mund Kieferheilkd Zentralbl. 1991
Community Dent Health. 1989-9
Diagnostics (Basel). 2023-12-12
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