Periodontitis is highly prevalent in the population and tooth loss due to periodontal disease is common. More and more friends are choosing dental implants for restoration. Before the implant surgery, these people should pay attention to the effective control of periodontal inflammation and remove as much as possible the decayed teeth, blocked wisdom teeth and loose teeth that have no retention value in the mouth. Some teeth with periodontal disease with angular bone loss requiring bone grafting or crown lengthening for restoration, or those requiring gingival surgery to correct limited gingival recession, need to be done before or at the same time or after the implant surgery according to the clinician’s choice to reduce the number of visits or consumption or pain. The practice of implanting the tooth first and then treating periodontal disease often leads to a variety of problems later on due to the inability to design the whole mouth and determine the prognosis of the natural tooth. Also, some pathogenic bacteria from the natural teeth can attach to the implant within 24 hours after implantation and cause peri-implant inflammation. Therefore, patients with periodontal disease must be examined by a periodontist before starting implant treatment. After the implant restoration, regular (six months or a year) periodontal maintenance (scaling, scraping and root planing of teeth with deep periodontal pockets, cleaning of implants with special instruments) is also beneficial to the stability of the intraoral situation, reducing the occurrence of periodontal disease and peri-implant disease and reducing costs. This article is published with the authorization of Dr. Li Peng.