Invisalign / Orthodontics: Orthodontic procedures are most commonly done on children but in recent years have become very popular for adults. Orthodontics treats patients with bite and teeth positioning problems that cannot self-correct with growth or other interceptive procedures. The orthodontist may use either a removable or a fixed appliance. Removable orthodontic appliances are easier to wear and care for and are advantageous in that it is easier to check the patient's progress and oral health. Fixed orthodontic appliances are attached to the teeth and can only be removed by the dentist. In determining whether to use a removable or fixed orthodontic appliance the dentist will factor in the nature of the problem and the tooth movement required to obtain a good result. In children, the child's ability to cooperate with the dentist and maintain good oral hygiene also will be considered. Orthodontics cannot only improve one's smile, but also improve the function of the teeth so they can last a lifetime.