Usually, scaling can wash away tobacco stains, but if the stains are more serious and have penetrated into the hard tissues of the teeth, it is more difficult to remove them completely through scaling alone.
Currently, commonly used dental scaling methods include ultrasonic scaling and sandblasting. The former, through high-frequency oscillation, can soften most of the tobacco stains on the surface of the teeth and make them detach from the tooth surface. The latter utilizes pearl salts and high-pressure water to rinse the teeth, which can remove traces of tobacco stains from the interspaces or fossa points and polish the surface of the teeth.
Most of the tobacco stains can be removed through ultrasonic scaling, and the surface of the teeth becomes smooth after sandblasting, which can prevent tobacco stains from being re-deposited to a certain extent. However, if you continue to smoke for a long period of time after the cleaning, the stains may still be deposited on the surface of your teeth.
Therefore, long-term smokers can go to the hospital for dental cleaning half a year or a year in order to remove the residual tobacco stains in time and keep their teeth clean.