The Interface of Oral and Brain Health: Current Insights Into the Bidirectional Relationship Between Alzheimer's Disease and Periodontitis

The bidirectional relationship between Alzheimer's disease (AD) and periodontitis highlights a critical interface between oral and brain health, increasingly recognized as a key axis in aging‐related degenerative diseases. This review synthesizes epidemiological, pathological, and mechanistic evidence underpinning their interconnected pathogenesis.