One of the main bonuses with Invisalign is that they are removable. However this can also be seen as a disadvantage. It is very easy to take out a removable mouth piece and lose it or have it damaged. Plus, the longer the brace is in the mouth each day, the more effective the treatment will be; too little time in the mouth with a removable appliance will slow down or interfere with the whole point of the exercise.
Is money a factor? Well, you might want to keep the braces! Yes, braces are already quite expensive, but the series of mouthpieces required by this new treatment system can cause its costs to exceed those of braces.
A very rare drawback, though potentially serious, are allergies related to the component parts of the clear appliance. Occassionally a person may need to visit a doctor or emergency room, but generally an itch or minor discomfort of the throat and mouth, including coughing, is as serious as the complication gets. It's likely that this new treatment will soon be available in non allergenic versions.
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