Metal braces are the most common type. They are made of high-grade stainless steel. Today's metal braces are smaller, more comfortable and more attractive.
Ceramic braces are made of translucent (clear) material. They are most popular with adult patients, due to their cosmetic appeal. The only drawback to ceramic brackets are that they are more fragile, and the elastic ties can discolor between orthodontic visits.
Invisalign is a method of orthodontic treatment which uses a series of clear, removable teeth aligners. The aligners are completely transparent, therefore far more difficult to detect than traditional wire and bracket braces. They must be removed before eating, an advantage and disadvantage depending upon the person. They and the teeth should be cleaned before re-inserting them afterwards.