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

双波长激光设备通过激光二极管激活Nd：YAG激光器。它是在光参量振荡器中将一个波长的输出转换成两个波长的激光输出的装置。利用该装置可以获得波长范围从1.6 μm到4.0μm的激光，并且可以同时产生多个波长的激光。3μm波段设置为与Er：YAG相同的2.94μm波长，可以有效地去除切割牙齿硬组织。在2μm波段，波长变为1.61μm，该装置通过光纤和手持机同时输出两个波长。该装置对2.94μm的龋蚀牙本质具有足够的切割能力。但是，牙本质、牙釉质的切割性能不够。当需要使用大容量的光学参量振荡器时，建议获得高输出。由于在狗的牙齿上进行了空腔形成，牙齿的牙髓有一些炎症变化，并显示出上级结果。人们更加认识到，用双波长激光切割牙齿硬组织显示出安全的切割特性，尽管对牙釉质的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.