08/02/2026
Breathing Through the Mouth During Sleep May Increase Cavity Risk
During sleep, saliva production naturally decreases. If breathing occurs through the mouth instead of the nose, the mouth can become even drier, reducing saliva's ability to wash away food particles, neutralize harmful acids, and help repair early enamel damage.
A recent systematic review found that children and adolescents who breathe through their mouths tend to have more dental plaque and gum inflammation, with limited evidence suggesting an association with dental caries. Although more high-quality research is needed, reduced saliva and a persistently dry mouth may create conditions that allow cavity-causing bacteria to thrive.
Maintaining good oral hygiene, staying well hydrated, and addressing persistent mouth breathing may help reduce cavity risk and support long-term oral health.
Reference:
Kimura ACRS, et al. Dental Caries and Periodontal Outcomes in Mouth-Breathing Children and Adolescents: A Systematic Review. International Journal of Paediatric Dentistry. 2026