Experts from Guangzhou New Era Dental Hospital said: After the correction is completed, the braces will be removed and the teeth will become straight and beautiful, but this is only half of a long march of thousands of miles. Next, you must wear a retainer. Because the teeth are not yet stable in their new position at this time, retainers must be used to maintain the new tooth position while waiting for alveolar bone reconstruction, which usually takes one and a half years. There are two types of retainers: removable and fixed. Fixed retainers are also called permanent retainers and are commonly used for adult patients. In recent years, there has been a clear retainer that combines comfort and aesthetics. It is no longer difficult to wear a retainer. According to experts from Guangzhou New Era Dental Hospital, orthodontic retainers should be worn for 2 years (which can be increased or decreased depending on different types of malocclusion patients). It is best to wear it 24 hours a day in the first year (except for eating and oral cleaning); in the second year, you can only wear it at night. After the retainer expires, the patient still needs to return for a follow-up visit every six months. Different people's oral conditions are different, and you need to choose how long to wear a retainer according to your doctor's advice.