The revision of big cities is generally around 1.5 million, and the worry that it is too cheap is not reliable. You still need to do some basic learning and understanding before correction. Orthodontics is generally divided into correction period and retention period. It takes about half a year in the early stage. After the teeth arrive at the destination, they need to wear retainers to make the teeth take root and grow firmly in the new position. This process will take about 2 to 3 years. After orthodontics, in order to achieve good results, don't bite hard food, which will hinder the orthodontic effect. There is also to maintain oral hygiene. Besides brushing your teeth in the morning and evening, you must also brush your teeth after meals. Brush off all the food residues left on the braces with a professional concave orthodontic toothbrush to prevent gingivitis and periodontitis. If there is food residue on the braces, which is difficult to remove, you can brush it off with an interdental brush. There is also regular inspection according to the doctor's instructions.