Hello, general correction takes about one and a half to two years. Generally, children are faster than adults, and tooth extraction treatment takes longer than no tooth extraction treatment. Complex mistakes and deformities take longer to treat than simple ones. The correction time of skeletal deformity is longer than that of simple tooth deformity. Everyone's situation is different, and it is necessary to analyze the specific situation and the treatment time. After the correction is completed, it is generally necessary to wear the retainer for about one and a half years.