Dentistry
Researchers disrupt bacterial signals to steer dental plaque toward health
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Scientists at the University of Minnesota have shown that disrupting how oral bacteria communicate can shift dental plaque toward communities associated with better oral health, potentially opening the door to new ways of preventing gum disease without wiping out beneficial microbes.
Hong Kong's universities saw their sharpest declines in three years in the QS World University Rankings by Subject 2026, with 53% of 266 subjects slipping. Data science and artificial intelligence fell, but dentistry at the University of Hong Kong stayed second globally, performing arts at the Hong Kong Academy for Performing Arts regained 10th place, and education at the Education University of Hong Kong entered the top 10 for the first time.
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Scientists have developed a new teeth-whitening powder that activates with electric toothbrush vibrations to remove stains while repairing enamel. Lab tests showed up to 50% whitening on stained teeth, and animal studies indicated improved oral microbiome balance. The findings appear in ACS Nano.
Research published October 22, 2025, in Neurology® Open Access reports that older adults with gum disease had more white matter hyperintensities—a marker of tissue damage—than peers without gum disease, even after accounting for other risks.
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People with both cavities and gum disease had an 86% higher risk of ischemic stroke than those with healthy mouths, according to research published October 22, 2025, in Neurology Open Access. The two-decade study of 5,986 adults linked poor oral health to higher rates of major cardiovascular events, while emphasizing the findings show association, not causation.