Angkanusorn, T., Rodanant, P. and Rawdaree, P. 2025. Impact of Oral Health Knowledge and Attitude on the Severity of Periodontitis among Patients with Type 2 Diabetes Mellitus: A Cross-Sectional Study: Oral Health KNWL & ATT Affecting Periodontitis Severity in T2DM. Vajira Medical Journal : Journal of Urban Medicine. 69, 4 (Aug. 2025), e274690. DOI:https://doi.org/10.62691/vmj.2025.274690.