Ando M, Shaikh S, Eckert G
Oper Dent. 2018 May/Jun;43(3):301-306. doi: 10.2341/16-236-L.
Caries lesion progression is difficult to determine with visual and tactile examinations. The hypothesis of this study was that reflection and roughness measurements could determine caries progression. Ground/polished sound human enamel specimens were analyzed at baseline (sound) and after two four-day demineralization periods for reflection using optical reflectometry (ORef) and for roughness using optical surface profilometry (SPro). Specimens were demineralized using a microbial- Streptococcus mutans aries model. Comparisons among the periods for ORef and SPro were performed using repeated measures analysis of variance. Two-sample t-tests were used for differences in transverse microradiography. The integrated mineral loss and depth of the four-day demineralization period were significantly smaller than those for the eight-day demineralization period ( p<0.01). With increased demineralization time, reflection was significantly decreased and roughness was significantly increased ( p<0.01). Correlation between ORef and SPro was moderate ( r=-0.63). Both reflection and roughness can be characterized for nondestructive longitudinal assessment of caries lesion progression.
通过视觉和触觉检查很难确定龋损的进展情况。本研究的假设是，反射和粗糙度测量可以确定龋病进展。使用光学反射测量法（ORef）对磨平/抛光的健康人牙釉质标本在基线（健康状态）时以及经过两个为期四天的脱矿质期后的反射情况进行分析，并使用光学表面轮廓测量法（SPro）对粗糙度进行分析。使用变形链球菌龋齿模型使标本脱矿质。使用重复测量方差分析对ORef和SPro在各时间段之间进行比较。采用两样本t检验分析横向显微放射照相术的差异。四天脱矿质期的综合矿物质损失和深度显著小于八天脱矿质期（p<0.01）。随着脱矿质时间增加，反射显著降低，粗糙度显著增加（p<0.01）。ORef和SPro之间的相关性为中等（r=-0.63）。反射和粗糙度均可用于龋损进展的无损纵向评估。
