Abstract: This paper reports a clinical case of periodontal systematic therapy combined with intentional replantation in the treatment of severe periodontitis. After periodontal system treatment, the hopeless tooth 32 of a 65-year-old female patient was treated with intentional replantation. The 2-year follow-up result shows that the natural tooth is maintained and has achieved good therapeutic effect.

Key words: intentional replantation, loose tooth fixation, severe periodontitis, minimally invasive tooth extraction, apicectomy