Plant rehabilitation is a new way for dental restoration of patients with periodontitis,which is attracting more and more attention. Clinicians should consider the severity of the patients with periodontitis and the influence of the basic condition of the body in order to grasp the chance of implantation and the process of periodontal treatment when deciding whether to have an implant surgery or periodontal treatment. There has been a lot of disputes in the application of implant restoration in patients wit...