Tea stained teeth is one of the exogenous pigmented teeth, mainly caused by long-term tea drinking. Chinese people have the habit of drinking tea for health, but years of drinking tea will also lead to tooth coloring problems, which will lead to yellowing and blackening of teeth, affecting personal image. If only a slight tea stain teeth, you can take ultrasonic scaling treatment, ultrasonic scaling is the use of ultrasound generated by high-frequency, high-energy vibration, through the smooth ultrasonic scaling machine work head to the tooth surface of the calculus, tooth stains broken, and then through the scaling machine generated by the water mist to the debris, plaque washed down, so that the teeth to restore clean, white, is a highly efficient, hygienic, convenient, comfortable means of dental cleaning It is a highly efficient, hygienic, convenient and comfortable dental cleaning means, which has been widely used in the clinic. In case of heavy tea stained teeth, the best whitening method is cold light whitening teeth under the principle of not hurting the teeth. Cold light whitening technology can not only remove the pigmentation on the surface of the teeth, but also have a certain effect on the pigmentation attached to the deeper layers, and the whitening effect is long-lasting and effective. For discolored teeth such as tea-stained teeth, coffee teeth, yellow teeth, black teeth, mild tetracycline teeth and mild fluorosis teeth, it only takes half an hour to make the teeth white, which is a very effective method of teeth whitening.