After a large tooth is extracted, there are three ways to repair it: first, to perform a movable denture. The movable denture requires the use of the neighboring teeth on both sides for retention, and the neighboring teeth on both sides will be moderately worn away to remove a certain amount of tissue, but the amount of wear is relatively small and within an acceptable range. The disadvantage of the removable denture is that it is less comfortable and the chewing efficiency is too low. The second disadvantage of porcelain crowns is that the hardest enamel on the surface of the natural teeth on both sides needs to be destroyed before the set can be restored. The third, the restoration of dental implants, the advantage is to restore more than 90% of the chewing efficiency, and the comfort is the best, aesthetics is also similar to natural teeth, the disadvantage is that the cost is relatively high, the average family may be difficult to afford, the cost of planting a tooth is about 10000 yuan, and the restoration time cycle is long, about half a year.