980nm Diode Teeth Whitening Dental Laser Equipment (VH5)TheoryLaser teeth whitening theory: A ... senile or hereditary yellow teeth, black teeth, tetracycline teeth, dental fluorosis, exogenous pigment teeth (Coffee, tea, and tobacco ... Dental Laser, IPL, ELIGHT, SHR, Cavitation, Vacuum, RF, Oxygen jet peel, LED, Vascular removal, Multifunction machine, etc.Mechanical Malfunction: Our equipment ...