Yellow teeth (yellow teeth) are caused by a variety of reasons, such as eating heavily pigmented food can make the pigmentation on the teeth, a brief coloring, generally use water or sterilization mouthwash rinse in time after meals can be. Ageing and drugs can also cause yellowing of the teeth, for such yellowing of the teeth, there is no simple clinical teeth whitening method, it is recommended that people with teeth whitening needs to professional dental hospitals for teeth whitening: 1, ultrasonic scaling: to remove dental calculus, dental calculus is easy to cause the accumulation of plaque, causing gingivitis, periodontal disease and other oral diseases, will affect the appearance of teeth. After the removal of calculus, the teeth will become clean to a certain extent and achieve the whitening effect. Deep staining of teeth can also be partially removed by ultrasonic scaling; 2, dental veneer restoration: a layer of material similar to normal tooth color can be pasted on the tooth surface to improve tooth color, usually there are different materials to choose from such as resin veneer and porcelain veneer, which are suitable for people with deep dentin staining caused by fluorosis and tetracycline teeth; 3, teeth cold light whitening: it is through low-temperature cold light technology to remove the teeth attached The whitening effect is obvious, but there is some damage to the tooth enamel, and the whitening effect can only be maintained for a period of time, and it is necessary to choose the appropriate treatment frequency under the guidance of the doctor; 4, teeth laser whitening: through laser heating, the catalytic reaction of the bleaching drug applied to the tooth surface in advance, so that it can quickly penetrate into the teeth, which can remove plaque, smoke stains, pigment, etc. The whitening effect can be maintained for a period of time. The original healthy color of teeth is light yellow in brightness, some people who are too much in pursuit of teeth whitening, forcible whitening is easy to damage teeth, it is recommended to listen to the doctor’s advice before the corresponding treatment. In addition, there are folk methods to whiten teeth using vinegar, lemon, strawberry, baking soda, salt, etc., but they are not recommended clinically because they tend to make teeth sour and soft and have a slight corrosive effect, and there is not a lot of data to show that these methods work significantly. In daily life, you need to pay attention to oral hygiene and brush your teeth regularly in the morning and evening to help your dental health.