Correcting teeth many times will cause root atrophy. The time of tooth loosening and shedding will be advanced. However, the younger the correction time, the better, because the root will grow better in the new position of alveolar bone, and it must be decided early if it is to be corrected again. If your situation is not very good, don't correct it. With the increase of age, there will be gaps between teeth. It is best not to use toothpicks after there is a gap, which will make the gap bigger. Flossing is recommended.