[Research progress on the bidirectional relationship between oral infectious diseases and mental health issues].

Dental caries and periodontitis share bidirectional relationships with depression and anxiety, operating through inflammatory pathways, oral microbiota dysbiosis, and the oral-gut-brain axis, while mental disorders simultaneously worsen oral disease through behavioural and medication-related mechanisms.

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.