Patients with yellow teeth can brush their teeth with regular fluoride toothpaste. Most toothpastes on the market have whitening ingredients, and the main ingredient of toothpaste is a rubbing agent, which mainly serves to clean the tooth surface and remove yellow stains and soft scale on the teeth, thus playing the effect of whitening teeth. If there is yellowish-brown pigmentation on the tooth surface, which is common among people who like to smoke and drink strong tea, the deposited pigment is difficult to be removed by brushing, and in this case, you need to go to the hospital for ultrasonic scaling. Scaling can remove tartar, pigment and plaque, create a good oral hygiene environment and restore the original face of teeth. If you are born with yellow teeth, tetracycline and fluorosis, or your teeth become more and more yellow with age, these cases cannot improve the color of your teeth by brushing with toothpaste, and you need to do cold light whitening to whiten your teeth.