Cigarettes contain tar, nicotine and other substances, and the process of smoking into the oral cavity will cause the pigment to be deposited on the surface of the teeth, if you want to alleviate or solve the problem of yellowing teeth caused by smoking, the methods are as follows: 1, reduce the frequency of smoking, the amount of smoking, as far as possible to make the pigment less deposited on the surface of the teeth. 2, through the ultrasonic cleaning of the teeth can be deposited on the surface of the teeth pigment and stubborn The problem of yellow teeth caused by smoking can also be solved by ultrasonic scaling. 3, the use of whitening toothpaste, through a long time to adhere to the use will also play a certain teeth whitening effect.