There are many ways to get rid of yellow teeth, such as medicated bleaching, cold light whitening, ultrasonic teeth cleaning and so on. 1. Medication bleaching: It has the best effect on teeth yellowing that deteriorates with age, medium effect on mild tetracycline and fluorosis, and poor effect on severe vegetal tetracycline and fluorosis because it is only surface whitening and not durable. But this method is safe and convenient, and will not damage the gums and pulp. 2. Cold light whitening: cold light whitening is a low temperature cold light irradiation, so that the whitening agent coated on the surface of the teeth is cured, and then the whitening agent will be peeled off, so that the pigmentation, calculus and other substances fall off, so as to achieve the effect of whitening teeth. 3. Ultrasonic cleaning: You can have your teeth whitened by ultrasonic cleaning, which removes plaque or tartar from the surface of the teeth through the high-frequency oscillations of the ultrasonic cleaning machine, thus improving the appearance of the teeth and playing a role in whitening them. If you want to whiten your teeth, you should go to a regular dental hospital for treatment.