Improper breathing and poor oral hygiene can affect oral health, leading to tooth decay and gum disease.
Tooth decay is caused when acids in the mouth eat away at your enamel, but your body has a natural defense mechanism: saliva. Saliva washes away plaque and also neutralizes the acids in your mouth, both of which prevent cavities. Unfortunately, your mouth becomes very dry when you breathe through your mouth at night, so you lose this protection.