Depression, Anxiety & Oral Microbiome
Depression and anxiety are bidirectionally linked to oral health through the gut-brain axis and chronic inflammation. People with depression have ~50% higher periodontitis rates, and oral microbiome composition predicts depression severity in some cohorts. Periodontal inflammation raises IL-6 and TNF-α, both of which independently elevate depression risk.
The Connection
Chronic inflammation alters serotonin metabolism and HPA axis function. Depression and anxiety reduce self-care, including oral hygiene, while many SSRIs and benzodiazepines cause dry mouth, accelerating decay and gum disease.
Why Coordination Matters
Mental health providers should ask about oral hygiene and gum bleeding as part of intake. Dentists should know which antidepressants cause xerostomia and should treat affected patients more aggressively.
What to Watch For
- Dry mouth from psychotropic medications
- Neglected oral hygiene during depressive episodes
- Bruxism (often anxiety-driven)
- Burning mouth syndrome
Frequently Asked Questions
Can gum disease affect my mental health?
Periodontitis raises systemic IL-6 and TNF-α, both of which independently elevate depression risk. Treating periodontitis can improve mood markers in some patients.
Why do antidepressants damage my teeth?
Most SSRIs and SNRIs reduce salivary flow. Saliva is the mouth's primary defense against decay, so xerostomia accelerates cavities and gum disease.