Peter Attia MD166 - Oral health, best hygiene practices, & relationship between oral health and systemic disease
At a glance
WHAT IT’S REALLY ABOUT
Periodontist Patricia Corby on Flossing, Oral Microbiome, Cancer Care, and Systemic Health
- Corby explains tooth anatomy and function, describing how decay progresses from enamel through dentin to the pulp, and why preserving natural teeth beats extraction or implants.
- Her twin study found that two weeks without flossing let periodontal pathogens become abundant and raised gum bleeding in adolescents, supporting her view that disease comes from microbiome shifts rather than from outside bacteria.
- Her radiation-oncology research suggests that intensive periodontal and oral care for head and neck cancer patients may reduce mucositis and suppress inflammatory markers, yet it is not standard of care or covered by insurance.
- She says periodontal disease is associated with diabetes, heart disease, Alzheimer's markers, and COVID complications, but stresses that most evidence is association and only clinical trials can show causality; she calls root canal-disease claims nonsense.
- Practical advice covers fluoride toothpaste, flossing, brushing three times daily, soft brushing of the tongue, electric toothbrushes, xylitol, avoiding routine mouthwash, careful whitening, and leaving functioning mercury fillings alone.
IDEAS WORTH REMEMBERING
5 ideasOral disease stems from microbiome shifts, not foreign bacteria
Corby says the periodontal pathogens are indigenous to everyone's mouth and flourish when habits, dry mouth, or inflammation change the environment. In her twin trial, they became abundant after just two weeks without flossing.
Flossing may matter even more than brushing
Corby argues from her research that people can stop brushing and recover easily, but plaque between teeth cannot be cleaned without a device. She notes that anaerobic bacteria hide there, and that roughly half of people floss.
Saliva is central to oral health
Saliva constantly flushes the mouth and maintains microbiome balance. Dry mouth from radiation, medications, or mouth breathing shifts the microbiome and can lead to fungal infections, so she recommends hydration and sugar-free stimulation.
Intensive oral care may help cancer patients
In her pilot, patients getting comprehensive periodontal care before and during radiation avoided mucositis and showed suppressed salivary cytokines. Her larger trial is testing this, but it is not standard of care or insured.
Links to systemic disease are associations, not proven causes
Corby cites associations with diabetes, low birth weight, heart disease, and Alzheimer's markers, and says only treatment trials can prove causality. Attia proposes inflammation as the simplest explanatory hypothesis.
WORDS WORTH SAVING
5 quotesThe only prevention is the mask, which we could do something better, right?
— Dr. Patricia Corby
Nick, you're gonna laugh, but I'm brushing their teeth.
— Dr. Patricia Corby
People can stop brushing and you recover health easily. People stop flossing, it's the gingivitis, inflammation comes so quick because the plaque that is in between your teeth, you can never change or clean if you don't have a device.
— Dr. Patricia Corby
I don't have generational wealth, but I have generational toothpicks.
— Peter Attia
We have over 700 different bacteria that lives in a perfect symbiotic, uh, uh, habitat in our, in a kingdom, right?
— Dr. Patricia Corby
High quality AI-generated summary created from speaker-labeled transcript.
