Alternative to the invisible membranes Invisalign, our practice uses the Clear aligners (www.clear-aligners.eu) according to the clinical indications. These aligners are transparent aligners that look like the Invisalign ones, but differ in their way of construction. In this technique, more than one impression is taken, one each month. The impressions are sent to a specialized orthodontic laboratory in Athens, F.N orthodontics (fnorthodontics.blogspot.com), which is certified for this technique. The company’s software utilizes these impressions to create a set-up, which takes about five days’ time. The set-up consists of three aligners of gradual hardness (soft, medium, hard). The three aligners will treat each of the three arches. The patient uses the aligners 20-22 hours a day for ten days. Most recently, thanks to computerization, the orthodontist can take in the beginning of the treatment only one impression, instead of multiple monthly impressions, from which all the necessary aligners for each specific case can be fabricated.