It is possible to refill a tooth that has fallen out, but you need to check the cause of the tooth restoration before filling it. If the loss is clinically specific due to biting a hard object, then it is usually possible to fill the tooth according to the original situation. There are special clinical cases, for example, the original preparation cavity is not very conducive to retention, and there is no good retention for the tooth restoration, after the fall, you can use the turbo drill to dove tail or inverted concave retention, and then repair the tooth. There is also a special case that secondary caries occurs around the original filling and causes the restoration to fall out, so it is necessary to remove the secondary caries with a turbo drill and then carry out a new filling treatment.