For patients who have lost teeth in their 20s, it is important to look at whether the lost teeth are permanent or baby teeth. If the baby teeth are in their 20s, you can check to see if there are buried permanent teeth in the mouth. If there is a buried permanent tooth, orthodontic treatment can be considered to pull out the permanent tooth. If there are no buried permanent teeth, restorative treatment can be considered three months after the loss of the baby teeth. If the lost tooth is a permanent tooth, treatment with veneers will be required after three months. It is possible that there is periodontal inflammation in a single tooth, or that there is occlusal trauma or trauma to the tooth. In any case, permanent teeth need restorative treatment after they have been lost.