Yellowing and darkening of teeth not only affects the overall appearance of the teeth, but can also endanger the health of the body in serious cases. In the current clinical practice, ultrasonic scaling and scaling powder can be used to clean teeth. Scaling powder can be harmful to teeth. The acid resistance of teeth after scaling powder will be significantly reduced, and it will easily lead to gum bleeding. This is because scaling powder can cause damage to the protective film of the teeth themselves. It is recommended to use scaling powder under the guidance of a doctor and to use it regularly, not frequently. There are many kinds of scaling powders in the market, but some of them can whiten the surface of the teeth, but they can seriously damage the enamel, which can cause the teeth to become very fragile and cause the enamel to fail to regenerate in serious cases. Also, some scaling powders tend to dry out the teeth, and long-term use of scaling powders can cause the surface of the teeth to rub rough and not smooth. However, the scaling powder also has certain advantages, it can remove the dirt on the teeth, play the role of fresh breath, remove the odor and whiten teeth. In short, you should pay more attention to the choice of scaling powder, go to a regular hospital to buy scaling powder, as well as to clarify the harm brought by scaling powder on teeth.