02/23/2026
🦷 WHEN SHOULD PATIENTS REPLACE THEIR TOOTHBRUSHES AFTER AN ILLNESS?
Some viruses or bacteria can linger on the toothbrush for several days. The experts stated that although pathogens can reside on the toothbrush after it’s been used during a sickness, continuing to use the toothbrush doesn’t typically result in reinfection because the antibodies produced during the sickness are capable of preventing recurring infections.
However, if sick individuals share toothbrush holders, all of the toothbrushes should be replaced. In this way, they will avoid spreading the disease to others. Additionally, individuals who are severely immunocompromised or who have experienced a cold sore should switch out their toothbrush for a new one to minimize the risk of reinfection.
Even though the ADA indicated that the efficacy of toothbrush sanitization is has not been thoroughly researched, some data found that hydrogen peroxide and ultraviolet light could reduce bacteria on toothbrushes. The experts concluded that toothbrushes should be replaced every three to four months or as soon as the bristles are frayed.
Info taken from ADA News