论文部分内容阅读
提出了一种利用低功率He-Nelaser(λ=632.8nm,2.0±0.1mW)光学无损诊断早期龋齿的方法,并与探诊方法、光子波动非线性转换方法(PNC)以及DIAGNodent龋齿诊断仪进行了比较。这种探测方法不使用滤光片,采集荧光光谱的能力与PNC方法和DIAGNodent龋齿诊断仪不同,所获得的牙齿特征光谱含有大量的关于牙齿成分、结构、空间构象等的信息。该项研究在离体牙齿上进行。牙齿的特征光谱由后向散射光、反射光、自体荧光3个部分组成,对自体荧光光谱的特征频率进行分析可以确定牙齿化学成分的改变,而对反斯托克斯荧光光谱进行分析则可以评价牙齿组织结构和形态学的变化。初步研究结果表明:文中方法在定量诊断各种龋齿方面极具应用潜力,对于探测早期龋齿、健康牙齿的表面损坏更敏感。
A method of optical nondestructive diagnosis of early caries using low power He-Nelaser (λ = 632.8nm, 2.0 ± 0.1mW) was proposed and compared with the method of probing, PNC and DIAGNodent caries detector A Unlike the PNC method and the DIAGNodent Caries Diagnostic, this method of detection does not use a filter. The acquired characteristic spectra of the teeth contain a great deal of information about the composition, structure and spatial conformation of the teeth. The study was performed on isolated teeth. The characteristic spectrum of teeth consists of three parts: backscattered light, reflected light and autofluorescence. Analyzing the characteristic frequency of autofluorescence spectrum can determine the change of dental chemical composition, while analyzing anti-Stokes fluorescence spectrum can be Evaluation of tooth structure and morphology changes. Preliminary results show that: the method in the quantitative diagnosis of various types of dental caries has great potential for the detection of early dental caries, healthy teeth more sensitive to surface damage.