Frayed bristles and tender gums signal toothbrush replacement

The American Dental Association recommends replacing toothbrushes every three to four months, as worn bristles lose effectiveness in removing plaque and can accumulate harmful microbes. Most dental experts say people overuse toothbrushes beyond recommended periods. Frayed or bent bristles fail to remove plaque effectively and may irritate sensitive gums. Research shows toothbrushes can harbor bacteria, including Streptococcus mutans, even after 24 hours of use. Experts advise discarding toothbrushes after contagious illnesses, though opinions vary. Proper care includes storing toothbrushes upright, allowing them to dry, keeping them away from toilets, and avoiding sharing them.