The general public will ask whether it is better to have a filling or an extraction for a decayed tooth. The recommendation is to retain as many teeth as possible, unless the situation is so severe that it cannot be cured by all means of treatment, then extraction will be resorted to. There are many ways to retain the teeth, the first is non-surgical treatment, such as medication, applying fluoride or remineralization solution for remineralization treatment, prophylactic fossa closure, once the cavity is formed can be taken to fill the material. For severe caries that affects the pulp or root tip, root canal treatment will be performed. After root canal treatment, if the defect is large in size, core restoration or full crown restoration will be performed. If a tooth can be preserved, it should be preserved as far as possible, rather than being extracted, which is certainly not as convenient or healthy as using your own teeth. From the aspect of economic benefits, after the extraction of teeth to take the most advanced means of dental implants, a dental implant about 1-2 million yuan, the cost is quite high, and after the completion of the dental implants, the actual effect of restoration or restoration of chewing function is not as good as their own teeth, and the most important thing is that the dental implants will face the risk of implantation failure. Therefore, it is recommended that the people keep their affected teeth as much as possible, and go to the hospital as much as possible for treatment of the affected teeth if the situation has not reached a serious level.