Study on Selective-caries-removal with Er:YAG Laser using Caries-detecting-dye-solutions

在日本，用龋齿探测器对龋损进行染色，然后用勺子挖掘机取出病变，以保存受龋齿影响的牙本质。然而，根据龋齿的面积和大小，这一过程是困难的。我们一直在进行研究，以一种简单而准确的方式选择性地去除龋齿。将实验性的龋病探测仪滴在样本上，对龋损进行染色，并用Er：YAG激光去除染色区域。重复这一过程，直到污渍区域被完全去除。激光输出为100mJ。使用显微硬度计(Cariotester)测试样品的硬度。研究了用Er：YAG激光去除试件的硬度，并与钢毛刺进行了比较。结果表明，剩余牙本质的硬度恢复到与正常牙本质相同的硬度，而Er：YAG激光与钢钻的硬度差异无统计学意义。

In Japan, a caries lesion is stained using a caries detector, followed by removing the lesion using a spoon excavator to preserve caries-affected dentin. However, this procedure is difficult depending on the caries area and size. We have been conducting research to remove caries selectively in an easy and accurate way. An experimental caries detector was dropped on sample to stain the caries lesion, and the stained area was removed using an Er:YAG laser. The process was repeated until the stained area was completely removed. The output of the Er:YAG laser was 100 mJ. The hardness of sample was tested using a micro hardness testing machine (Cariotester). It was investigated the hardness of sample removed using Er:YAG laser and the steel bur were compared. As a result, the hardness of remaining dentin turned into the same hardness as sound dentin and the significant difference was not between using Er:YAG laser and the steel bur.