A facemask — also known as a reverse pull headgear or protraction facemask — is an orthodontic appliance worn on the outside of the face that works in combination with an expander inside the mouth to guide the growth of the upper jaw forward. It is used to correct a specific type of bite problem called an underbite caused by an underdeveloped upper jaw — and it is most effective when used during periods of active growth in children and young adolescents. Here is your complete guide.

A Maxillary Skeletal Expander — or MSE — is a bone-anchored palatal expander that is used to widen the upper jaw. Unlike traditional palatal expanders that work by pushing on the teeth, the MSE is anchored directly into the bone of the palate using small titanium mini-screws, allowing it to widen the jaw itself at the midpalatal suture.

It is a highly effective appliance for patients who need significant skeletal expansion — and understanding what to expect after placement will make the process much smoother. Here's your complete guide.