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.

Removable orthodontic appliances come in many forms — from appliances with Z-springs that tip or move individual teeth, to removable expanders that gently widen the dental arch.

Whatever type your dentist has prescribed, the principles of wearing and caring for your appliance are the same. Here's your complete guide.

A Twin Block is a removable orthodontic appliance made up of two separate parts — one for the upper teeth and one for the lower teeth. When worn together, the blocks guide the lower jaw forward into a more favourable position, helping to correct the relationship between the upper and lower jaws. It is one of the most effective and widely used functional appliances for growing patients. Here's everything you need to know.