Retainers are worn for about two years after braces are removed. In order to quickly fix the shape of teeth after braces removal, it is necessary to wear a retainer for about two years. In the first year, the retainer is worn in the morning and evening, and it is recommended to take it off when you eat food and continue to wear it after brushing; in the second year, the retainer can be worn in the evening every day, and gradually reduce the number of times and increase the interval time. Each person’s orthodontic condition is different, wearing retention time is also slightly different, specific consultation with the orthodontist. During the period of wearing the retainer also need to adjust the diet, it is best not to eat too hard food, so as to avoid crooked teeth or rebound. It should be noted that wearing braces, the environment in the mouth will change, some people just wear braces, the symptoms of long ulcers, at this time you can use orthodontic protective wax coated on the top of the braces, to avoid irritation of the soft tissues.