There are some variations in the time it takes to straighten the front of the teeth depending on the corrective program and age. Generally speaking, it usually takes about 2 years for adults to have their teeth straightened, and teenagers will be a bit faster. This is because teenagers have a higher metabolism and a relatively lower density of bone deposits, so the correction time for teenagers will be relatively shorter. There will also be some differences in orthodontic time between people of the same age, because each person is a biological individual, their bone density, chewing habits and growth pattern are different, will affect the speed of tooth movement, which affects the time of orthodontic correction, resulting in orthodontic correction required time is different.