If you want to keep your teeth tidy, the most important thing is to keep wearing the retainer. Because even without wisdom teeth, it is possible that the crowding will recur because of the tendency of teeth growing forward. Therefore, the view of some foreign doctors is to wear retainers for life. (Of course, the daily wearing time can be gradually reduced. Please consult your orthodontist for details, and it will be decided according to your own situation. )