Dr Teppei Tsukiyama Title: Successful multidisciplinary treatment strategy for patient with severe periodontal disease. Introduction It is easy for dentist to make a patient-oriented snapshot treatment plan based on the first impression. However, stepping into a deeper level, it is important to evaluate from all different aspects including history throughout patient’s lifetime. When considering treatment from a lifetime perspective, even patient presented with same clinical conditions, treatment planning becomes diversified depending on multiple factors such as age, motivation, compliance, genetics…