Oral Health

Research summary

• The link between periodontal disease and cardiovascular health is backed by an unusually large body of meta-analytic evidence.
• A meta-analysis of 39 prospective cohort studies spanning 4,389,263 people found periodontal disease was associated with a 24% higher risk of major adverse cardiovascular events, a 26% higher stroke risk, a 42% higher risk of cardiac death, and a 31% higher risk of all-cause mortality.
• A separate meta-analysis of 32 longitudinal cohort studies found a more modest but highly consistent 20% higher cardiovascular disease risk in people with periodontal disease, climbing to 25% in those with severe disease and 24% for stroke specifically.
• An umbrella review of 41 systematic reviews rated with the AMSTAR-2 quality tool confirmed this association across the literature, with risk and odds ratios ranging from 1.14 to 4.42 depending on the outcome studied, though it cautioned the underlying studies carry real methodological limitations.
• On the treatment side, a meta-analysis of 21 randomized controlled trials found non-surgical periodontal therapy (essentially deep dental cleaning) significantly reduced two cardiovascular risk markers, interleukin-6 and systolic blood pressure, though it found no significant effect on cholesterol or several other inflammatory markers, and an earlier meta-analysis of 10 trials similarly found periodontal treatment lowered C-reactive protein and white blood cell counts.
• Together this shows a consistent association across a huge number of people and a plausible biological mechanism (systemic inflammation), but -- as the review authors themselves note -- an association this size cannot rule out shared risk factors like smoking, diabetes, and poor overall health driving both poor oral health and cardiovascular disease simultaneously, and treating gum disease has not yet been shown in trials to reduce heart attacks or strokes themselves.