Invisalign is a removable orthodontic appliance offered as an alternative to more traditional orthodontic solutions. A type of clear tooth aligner, Invisalign is intended for people who find the idea of a mouthful of metal braces and brackets – however effective – too unattractive to commit to. If you’re a candidate, you can maintain your smile aesthetics while straightening your teeth.
The use of a series of removable aligners for the adjustment of occlusion (bite) is not new. The Invisalign method is based on a concept first introduced in the 1940s and revisited in the 1970s that required a series of dental impressions to determine the optimal position of the teeth. The update method is simpler than its predecessors, requiring only one set of impressions and photographs of the teeth, taken during an initial consultation.
These impressions are used to create a three-dimensional computer projection of how the teeth could be moved incrementally, forming the basis for developing a series of custom-made aligners designed to accomplish this movement.
Invisalign aligners are manufactured at the Align Technologies dental laboratory using computer-aided design/computer-aided manufacturing (CAD/CAM) processes. The aligners are sent to the dentist, who typically dispenses them in groups of one or two at a time during regular check-up appointments (about every four to six weeks) so that treatment can be properly managed. Each aligner must be worn in its specific order for about two weeks, during which time it moves the teeth in small increments of about .25 millimeters to .33 millimeters. Although the aligners are removable (for eating, drinking certain beverages and brushing/flossing), they must be worn at least 20 hours a day in order to reposition the teeth successfully.
A typical treatment requires 20 to 30 aligners for both the upper and lower teeth. Most adults complete their treatment in less than one year. However, treatment time depends on the specific alignment problem.
Invisalign is currently approved for adults and teenagers with completely erupted permanent teeth who can faithfully follow the directions for treatment – how long they have to wear the aligners each day, what they can and cannot eat and drink, seeing their dentist for follow-up appointments, etc. For example, dentists recommend that you drink only water while wearing the aligners, to prevent staining of the plastic. If you do not follow treatment recommendations, you may compromise treatment success.
According to researchers and Align Technologies, Invisalign can be used to correct the following types of mild dental problems:
Invisalign may not be appropriate for certain cases of misalignment or complex bite problems. Fixed orthodontic appliances (traditional wire and bracket braces) can be used for complex malocclusions.
Though not as esthetically appealing as clear aligners, today’s traditional braces have been improved so they are smaller, less visible and more efficient. These newer wire-and-bracket braces also help to correct misalignment much faster than before.
Only a dentist can determine which treatment option might be right for you. In addition, an orthodontic specialist (orthodontist) can advise you about orthodontic treatment alternatives. If Invisalign is not appropriate, traditional orthodontics can still be used for such conditions as:
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