Insertion of a tooth into its alveolus after the tooth has been extracted for the purpose of performing root-end surgery. When endodontic treatment is needed, the only alternative to endodontic treatment is extraction of the tooth. if you have the tooth removed, adjoining teeth may shift, interfering with biting and chewing. Loss of a tooth can also lead to periodontal (gum) disease and loss of additional teeth. You can have a replacement tooth implanted or attached to adjacent healthy teeth, but no matter how effective modern tooth replacements are, nothing is as good as a natural tooth.