In this video in 3d we can see the use of two different types of orthodontic devices. One of them, the palatal expander, is used to expand the palate in patients that did not finish their growing yet and that have a very narrow palate. The other device, the extraoral traction mask, is used to traction the maxilla in patients that have a poor developed maxilla. It is also used in patients that did not finish their growing period.
On our Youtube channel you can find more videos like this.