Why do we have to wear retainers after orthodontic treatment?

We need to wear retainers because your teeth have moved and your whole oral environment is a dynamic environment, it’s always changing. And your teeth are moving your whole life. It has the ability to move your whole life. So even for someone who did not do braces, you’d find that over the number of years as you get older, there will be some tooth movement. So all the more someone who has done braces, their original teeth was like that and then it moved straighter and straighter. Your teeth would like to go back to the way it was before, so we’d like to retain it in the same position, which is why we wear retainers. We want to make sure there’s something holding the teeth during that time. And of course, there are two types of retainers. There’s removable ones and permanent ones.