Periodontitis, Tooth Loss, and Risk of Cognitive Impairment and Dementia: A Systematic Review With Meta-Analysis.

Researchers pooled findings from 59 cohort studies and found that severe periodontitis, unspecified periodontitis, tooth loss, and low tooth count were each associated with moderately increased risk of dementia or mild cognitive impairment, though substantial study variation and potential bias limit causal conclusions.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.