Aquafresh conducted a detailed study examining the microbiological conditions of toothbrushes from various brands—focusing on the bacteria that accumulate over time.
The research involved 37 volunteers whose toothbrushes were tested monthly over three months. After this period, researchers discovered an average of seven million bacteria per toothbrush.
E. coli bacteria
Among the findings was E. coli, commonly found in mammal intestines, as well as on unwashed vegetables and raw meat. The study also identified five known pathogens linked to caries and conditions like periodontitis.
Potential Risks
While the results don't confirm a direct risk of infection, the presence of these disease-causing bacteria underscores the issue. Dentists routinely advise replacing toothbrushes every three months for optimal oral health.
Additionally, worn bristles significantly reduce plaque removal efficiency. Yet, many people continue using the same toothbrush for much longer—often up to a year.
