BEST DENTIST IN ANNA NAGAR! When we sleep, our body naturally reduces its production of saliva. Saliva is crucial for chewing and digestion, but it also neutrali[z]es acids and keeps our mouth moist and healthy. Breathing through our mouth instead of our nose can dry our teeth and gums. This causes soft tissues to shrink and gives bacteria a foothold to grow. Not only is this uncomfortable, but it can set the state for bad breath, infection and eventually, periodontal disease. Obviously, brushing your teeth before bedtime is essential. But it doesn’t have to be done immediately before turning in. Many types of toothpaste can dry out your mouth. Brushing an hour or two before bedtime may be better.