Orthodontic wax is used when there is irritation to the lips or cheeks caused by a bracket, hook or wire. You may also find wax is especially helpful in the first week with braces as you are getting used to them. Wax can be used on any part of any of the braces and works by covering the irritant until the tissue has a chance to recover.
To use it, take a small piece of wax depending on the size of the area you would like to cover, warm it with your fingers, and gently push it onto the area. Make sure that the tooth and bracket are dry, otherwise the wax will not stick as easily.
Wax will stay on for as long as you need it, so be sure to take it off before eating or drinking something hot. Although its best to remove before eating, wax is made of beeswax and is safe to ingest.