Many people are concerned about whether there will be after-effects after orthodontics? For example, teeth loosening, tooth extraction affects the nerve, etc. Orthodontics is a science that has undergone more than 100 years of clinical practice. It has been proved that regular orthodontic treatment will not affect the life of teeth, let alone cause loosening of teeth, instead, because good oral hygiene habits are developed during the orthodontic process, thus making periodontal healthier and preserving teeth for a longer time or even for a lifetime. The extraction of the tooth is the end of the nerve and will not affect the other nerves in any way, much less the intelligence. Therefore, if there is any “after-effect” of orthodontics, it is that it can prolong the life of teeth.