A restraint effect of dental caries of a Dual wave length laser

双波长激光装置通过激光二极管激活NdYAG光。它是在光学参量振荡器中输出转换一个波长的装置，得到两个波长的激光器。利用该装置和可同时出现多个波长的装置，从1.6kW获得了波长范围为4.0μm的激光。3μm波长设置为2.94μm，与Er：Yg激光相同，可以有效地去除牙体硬组织。为此，我在2μm频段变成了1.61μm，这台设备通过光纤和手和两个波长同时输出。该设备在2.94μm处对龋牙本质的切割能力较强，但对牙本质、牙釉质的切割能力不够。建议在需要使用大容量光学参量振荡器的情况下获得较高的输出，对狗的一颗牙齿进行空洞形成后，牙髓有少量的炎症变化，显示出良好的效果。双波长激光切割牙体硬组织具有安全的切割特性，但对牙釉质的切割效率不如双波长激光。

Dual wave length laser equipment activates Nd : YAG laser by a laser diode. It is the equipment which the output converts a wavelength in an optical parametric oscillator, and get a laser of two wavelengths. It is getting laser light of wavelength area of 4.0μm from 1.6 by this and the equipment which can occur more at two wavelength same time. The 3μm band set it for a wavelength of 2.94μm the same as Er:YAG which could go away effectively which cut dental hard tissue. On this account I became 1.61μm in 2μm band.This equipment output it through optical fiber and hand peace at two wavelength same time. This equipment showed enough cut ability in cut of caries dentin at 2.94μm. However, the dentin, the enough cut performance of tooth enamel were not provided. It was suggested to get the high output when it was necessary to use a big optical parametric oscillator of capacity.As a result of having done cavity formation on a tooth of a dog, there were a few inflammatory changes of pulp of tooth and showed superior results. It was more recognized that cut of dental hard tissue with a dual wave length laser showed safe cut characteristics although the efficiency was inferior for enamel than this.