This new system for straightening teeth is custom-made, removable, efficient, comfortable, and, above all, almost invisible. With Invisalign® you only see the results. Invisalign® system consists of a series of removable and almost invisible aligners which are replaced every two weeks with a new set. Each clear aligner is custom made, created specifically for the patient who is going to wear them. Every time the patient wears a new set, teeth begin to gradually shift, week after week, until the treatment plan is completed and teeth are shifted into their correct position. An advanced 3D computer graphics software (ClinCheck® software) projects teeth movements during the treatment plan. This way patients will know how their teeth will look like even before they start the treatment. Most important, it is thanks to the ClinCheck® software and the results of its analysis that clear, custom-made aligners can be created, unique for each patient and for each treatment plan.