Hello, invisible orthodontics, as its name implies, is to make others feel that your correction is just like invisibility. There are two kinds of invisible orthodontics. The first is bracket-free orthodontics, which is like a transparent bracket, and uses computer principles to gradually correct our teeth. The other is that our teeth have three sides. Speech orthodontics takes advantage of the fact that we can't see the language surface, so that the words of our appliance can't be seen in others' field of vision.