When a tooth is lost and the roots are not lost, the tooth is usually missing its crown, but the roots are still present. In this case, it is necessary to look at the remaining roots and the degree of retention to determine whether the roots can be used. If the roots are long enough and secure, they can be used. After root canal treatment, a metal or fiber pile is placed in the pulp of the corresponding root, and a porcelain or all-porcelain crown is placed on top of the pile in the form of crown restoration. However, if the roots are loose and short, they are mostly worthless and need to be extracted, and after extraction, a removable denture or fixed denture can be considered for the restoration of the missing tooth.