In orthodontics, some teeth are divided at the same time when teeth are extracted, and some are carried out after tooth extraction. It usually takes about 65,438+0 weeks to divide the upper, lower, left and right teeth. The purpose is to move the teeth out of the gap, so that when wearing braces, the steel ring that fixes the braces can be put in. Generally speaking, tooth separation will be a little sore and weak, and it will hurt a little when the upper and lower teeth meet together!