Trinity College Dublin researchers discovered insights into oral microbiome evolution from the Bronze Age to the present.

The study analyzed 4,000-year-old teeth from an Irish cave, finding bacteria associated with tooth decay and gum disease.

Comparative analysis of ancient and modern bacteria revealed dietary sugar increase as a major factor in cavity prevalence.

Cultural shifts in the industrial era significantly influenced the evolution of disease-causing oral bacteria.

The research provides understanding of diet's role in oral health and the cultural impact on oral microbiomes through history.