The application discloses a method and device for bleaching teeth, the method is: (1) applying a whitening agent containing
hydrogen peroxide to the surface of teeth; (2) activating the whitening agent by using a composite activation source; wherein the composite activation source comprises superimposed applied
halogen light and ultrasonic
waves, the
halogen light has an
illuminance of 170000
lux-290000
lux and a
wavelength of 400-650 nm; the
center frequency of the ultrasonic
waves is 40+ / -1 KHZ. The device has a composite activation source emitting part, which is mainly composed of an
LED lamp, a
halogen lamp and an ultrasonic wave generator. The application can accelerate the external
diffusion rate of
hydrogen peroxide through
tooth enamel, effectively shorten the bleaching time, improve the comfort of patients in
tooth whitening treatment and has a good whitening effect.