Epidemiological and sociodemographic transitions of severe periodontitis incidence, prevalence, and disability‐adjusted life years for 21 world regions and globally from 1990 to 2019: An age‐period‐cohort analysis

Oral health varies significantly across regions, and it is essential to address inequalities in oral health between countries. Effective measures to prevent severe periodontitis risk factors should also be taken in regions with low SDI.