Hard bristles increase canker sore risk

A study in the Journal of Oral Pathology and Medicine found that toothbrushes with hard bristles may double the risk of traumatic canker sores compared to brushes with soft or ultra-soft bristles. These sores, which are painful ulcers inside the mouth, can recur frequently and affect up to 20 percent of people regardless of age.

Brush wear and maintenance matter

Dentists explain that hard bristles, visible wear, and poor maintenance can weaken the mouth's soft tissues, increasing the likelihood of canker sores. Worn bristles lose their effectiveness and may damage the delicate oral mucosa, while brushes not rinsed or stored properly can harbor bacteria.

Dentist highlights common mistakes

Dr. Sophie Marin, a dentist in Tours, says many people with chronic canker sores use brushes that are too firm or worn. She notes that switching to a gentler brush can significantly reduce the frequency of these sores, which are often caused by physical irritation rather than internal health issues.

Preventive dental care tips

To protect the mouth, experts recommend using soft or extra-soft bristles, replacing toothbrushes every three months, avoiding harsh toothpastes with sodium lauryl sulfate, staying hydrated, and limiting acidic or salty foods. These steps can help reduce irritation and lower the risk of traumatic canker sores.