Your dentist will know what appliance is best for your particular problem, but you often have a choice. Braces generally come in three varieties: The most popular type are brackets, metal, ceramic or plastic, that are bonded to teeth. Ceramic brackets are typically clear or tooth-colored and are far less noticeable than metal brackets. Lingual, or concealed, braces are brackets that attach to the back of teeth, hidden from view. Both types of braces use wires to move the teeth to the desired position.

A new alternative to traditional braces is a series of clear, customized, removable appliances called aligners. Not only are these braces invisible, but they also are removable so they won't trap food and plaque between your teeth like metal braces. You'll wear each aligner for about two weeks and only remove it for eating, brushing and flossing. This may be an option for adults with mild spacing problems. Invisible aligners are not appropriate for children and adolescents who are still waiting for permanent teeth.