Hello, this condition is not terrible. There are normal parasitic bacteria in people's mouth and a large number of microorganisms in the air. The mouth is often in contact with the outside world. Wearing an appliance after tooth shaping will hinder brushing. 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. Patients with this disease can't smoke, drink or eat spicy food, and their diet should be light and nutritious as far as possible, so as to exercise and maintain physical and mental health.