If you sleep with your mouth open during the night, then you have a greater risk to ruin your teeth.
The thing is quite clear. The saliva has a natural ability to destroy bacteria that produce acid. If there is less saliva, there are more bacteria in your mouth, and that is why your teeth decay faster.
If you sleep with your mouth open, then your mouth gets dry. This is the reason why this habit is damaging your teeth. According to many experts, when your mouth is dry, the protective layer of saliva disappears. Then the level of acid in the mouth grows, and this acid erodes the tooth enamel.
Dentists have long suspected that people who have more caries asleep with their mouths open, and this discovery confirms their theory. In normal conditions, the acidity in the mouth is at a neutral level of 7.7, while the level of those who sleep with their mouths open is reduced to 6.6, which is indicating mild acidity. For some people, the level of acidity in the mouth is very high, even 3.6.
This level is high enough that erodes the enamel. A similar effect have orange juice or a soda if you drink them before going to bed. Men are more prone to breathing through the mouth during sleep, even a third of them have this awful habit, while only five percent of women have this habit.
Many often sleep with their mouths open because they cannot breathe properly through the nose. Therefore, many experts advise you, before bedtime, to free your airways or use a spray that will make it easier for you to breathe through the nose.