WHAT DOES CR:YAG CRYSTAL MEAN?

On root cementum, concerning thermal influence in the course of irradiation, prior scientific studies showed only a little charred visual appearance was produced by Er:YAG laser with out water coolant [31], whereas apparent carbonization was observed with Er,Cr:YSGG laser with out drinking water coolant [32]. Appropriately, the Er:YAG laser makes s