A supernumerary tooth is a malformation of the tooth that is asymptomatic and does not require treatment. Tooth growths are commonly seen as a malformation of the central cusp of the tooth, or a malformed cusp of the tooth, which is a white protrusion above the tooth, or a small cusp, a developmental malformation of the tooth, which is also considered by some to be a reversion in humans, and does not need to be treated if it does not affect the normal bite. If it affects the bite, it needs to be adjusted to lower the bite to avoid causing tooth fracture. If a tooth growing on a tooth is not detected in time, accidentally eating a hard object causes the tooth to fracture, exposing the dentin or exposing the nerve of the tooth, and under the infection of salivary bacteria, pain or necrosis of the nerve of the tooth occurs, which needs to be treated in time. If the nerve is not exposed, the tooth can be filled to isolate the nerve from external stimulation. If the nerve is exposed, root canal treatment of the tooth is required. The infected nerve is removed and the tooth is then treated with a root canal. In severe cases, a crown restoration may be required to prevent the tooth from splitting. Therefore, if the tooth does not affect the bite, it does not need to be treated, if it is too high, it needs to be adjusted, and if it is serious, it needs to undergo root canal treatment.