Four-dimensional observation of remineralization phenomenon with carious lesion using micro CT method and laser irradiation.

我们使用具有地下脱矿质的人类磨牙，通过激光照射牙齿表面来阐明龋齿病变的恢复。我们研究的目的是观察二氧化碳激光辐射后牙釉质的质量。这些观察是通过显微 CT 无损完成的。以钙化的时间轴变化和病变程度扩大范围来评价连续的定量变化。我们用光滑表面有白斑龋齿的磨牙进行实验。为了观察龋齿的恢复情况，我们对白斑进行了CO2激光照射和氟化钠涂抹相结合的治疗。我们在拍摄显微 CT 后观察了 3D 图像中的样本。结果，激光照射样品的脱矿深度存在显着差异。我们从这项研究中提出，牙齿表面涂层剂和CO2激光照射可能是表面下脱矿质的有效区域。

We clarified the caries lesion recovery by the laser irradiation on the tooth surface, using human molars with subsurface demineralization. Purpose of our study is the quality of enamel after a CO2 laser radiation. These observations are done non-destructively by means of micro CT. Sequential quantitative changes was evaluated with the time axis variation of the calcification and the degree widening range of lesion. We used the molars having a white spot caries in smooth surface for experiments. In order to observe the recovery of caries, we performed the combination of CO2 laser irradiation and sodium fluoride application to the white spot. We have observed samples in the 3D image after shooting micro CT. As results, it was a significant difference in demineralization depth in a sample of laser irradiated sample. We suggested the possibility of the tooth surface coating agent and irradiation of the CO2 laser is effective area of subsurface demineralization from this study.