What is dental calculus DNA analysis?

A technique that analyzes minute amounts of DNA extracted from ancient dental calculus to identify oral microbial composition and diet from the past.

Is there a relationship between 'ohaguro' (teeth blackening) and periodontal bacteria?

This study found that a specific group (clade B) of the periodontal-related archaeon M. oralis was frequently detected in individuals with evidence of teeth blackening.

Why do oral microbiomes differ by region?

It is believed that regional differences in lifestyle, climate, and dietary habits influenced the types and proportions of microbes coexisting in the oral cavity.

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Unraveling the Relationship Between Ancient Japanese and Oral Microbes from Dental Calculus DNA

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A research group including Toho University and the University of Tokyo analyzed ancient dental calculus DNA from the Edo period, revealing characteristics of past oral microbiomes. They confirmed a microbial composition different from modern times and suggested a link between teeth blackening (ohaguro) and specific archaeal lineages.

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Frequently Asked Questions

Q: What is dental calculus DNA analysis?: A: A technique that analyzes minute amounts of DNA extracted from ancient dental calculus to identify oral microbial composition and diet from the past.
Q: Is there a relationship between 'ohaguro' (teeth blackening) and periodontal bacteria?: A: This study found that a specific group (clade B) of the periodontal-related archaeon M. oralis was frequently detected in individuals with evidence of teeth blackening.
Q: Why do oral microbiomes differ by region?: A: It is believed that regional differences in lifestyle, climate, and dietary habits influenced the types and proportions of microbes coexisting in the oral cavity.