Autotransplantation of teeth has been performed for many years and with varying degrees of success. The present report concerns the long-term results of autotransplantation of 36 teeth with completed root formation. Endodontic treatment was started before or within 12 weeks after transplantation. At the final check-up 32 teeth were present, 24 of them without signs of inflammation, replacement, or internal resorption. Careful radiographic examination during the follow-up period and adequate therapeutic measures with inter alia renewed endodontic treatment are of importance for successful autotransplantation.