Figure 1. Incidence of tooth extraction according to the presence of acute PD in Koreans during 12 years of follow-up in the National Health Insurance Service-National Sample Cohort. PD: periodontal disease, TE: total extraction, EPD: extraction due to periodontal disease, IEPD: immediate extraction due to periodontal disease. Figure 1. Incidence of tooth extraction according to the presence of acute PD in Koreans during 12 years of follow-up in the National Health Insurance Service-National Sample Cohort. PD: periodontal disease, TE: total extraction, EPD: extraction due to periodontal… J Periodontal Implant Sci. 2017 Oct;47(5):264-272. https://doi.org/10.5051/jpis.2017.47.5.264