To make your teeth whiter, you can undergo cold light whitening treatment, ultrasonic scaling and other methods, as follows: 1, cold light whitening treatment: for patients with endogenous staining of teeth, such as congenital yellowing of teeth, and patients with tetracycline teeth or fluorosis, are very suitable for cold light whitening treatment, cold light whitening is the whitening agent into the dentin inside, neutralize the pigment in the dentin, so as to enhance the teeth 2, ultrasonic scaling: If the yellowing and blackening of teeth are caused by exogenous coloring, such as long-term smoking and coffee drinking, which can lead to dark brown pigmentation on the tooth surface such as tea stains and tobacco stains, ultrasonic scaling is recommended for such patients to achieve the effect of whitening teeth, using the ultrasonic scaling method can completely remove the pigment and tartar from the tooth surface and restore the original teeth. The ultrasonic scaling method can thoroughly remove the pigment and tartar from the surface of the teeth and restore the original face of the teeth, so as to achieve the effect of whitening teeth.