Hello, there are normal parasitic bacteria in people's mouth and a lot of microorganisms in the air, so the mouth is often in contact with the outside world. Wearing an appliance on your teeth will hinder brushing your teeth. If the teeth are not brushed well, there is food residue between the teeth, and a large number of bacteria will cause dental caries or periodontal tissue inflammation, which will destroy the whole course of treatment. Therefore, the most ideal way of dental care is of course to brush your teeth after every meal. If it is inconvenient to brush your teeth after meals, you can rinse your mouth with water or tea.