The Mouth Body Connection: How Oral Health Reflects and Influences Systemic Health

Oral diseases affect 3.5 billion people and share risk factors with leading non-communicable diseases (NCDs). Strong evidence now confirms a clear bidirectional “mouth-body connection” between periodontitis and diabetes, cardiovascular disease, rheumatoid arthritis, adverse pregnancy outcomes, Alzheimer’s disease, and chronic kidney disease. Mechanisms include systemic inflammation, bacteraemia, molecular mimicry, and shared socio-behavioural determinants. Periodontal inflammation often appears years before systemic diagnosis, making the oral cavity both a diagnostic window and a modifiable risk factor. The 2022 WHO Global Oral Health Status Report and FDI resolutions have elevated oral health to a core component of universal health coverage (UHC), mandating integrated medico-dental models.