1. Thermal effect: The cutting of soft tissue is mainly achieved by this effect. If the laser energy hits water molecules, the water molecules can be excited into a state with high-speed kinetic energy. This fluid kinetic energy can achieve good results in tissue cutting, that is, water molecules are used as the medium for laser cutting. Water molecules can easily absorb the laser energy of this wavelength, but will not damage the bonding structure of water molecules.
2. Mechanical effect: The ability of laser to cut hard tissues does not come from temperature effects, but uses energy to evaporate water in the tissues, causing internal pressure to increase before the melting point of the hard tissues is reached. It causes the rupture of the organization. This phenomenon is called micro-burst.
(microexplosion), not directly related to temperature effects.
3. Hydrodynamic effect (hydrodynamic effect): For example, the latest Erbium Chromium YSGG laser (ErbiumChromium: Yttrium-Scandium-Gallium-Garnetlaser) is mainly the hydrodynamics of laser excitation of water molecules to produce high-speed power. After the tissue absorbs the laser energy, https://www.zhangzhongfengyun.comthe temperature will increase. When the temperature is between 370C and 600C, the tissue will not change. Once it exceeds 600C, it will begin to solidify, which can achieve the effect of hemostasis. When the temperature exceeds 1000C, the water between the cells will be evaporated. The remaining dehydrated tissue will be carbonized when it exceeds 2000C.