When you visit the orthodontist, he will do a dental exam and provide you with all of the information that you need. During the exam, the doctor will use a scanning machine to take precise 3D images of your teeth that will help him set up the treatment plan. The first visit also includes dental impressions and x-rays. All of this information is later sent to dental technicians that will create a three-dimensional model for each patient. Based on this model they will be able to come up with a treatment plan. This way you will get aligners that are custom-made only for your dentition. These aligners are transparent and are made of a special thermoplastic material, they are very thin and fit perfectly to your teeth. You will have to visit the orthodontist every two weeks to get a new aligner. Each aligner will provide a slow movement of the teeth, and the strength that is used is very controlled, so there are no chances of any unwanted risks and complications. During the period of two weeks, the aligners only treat certain teeth. The treatment is sequential and divided into sessions, each session is reserved for a different tooth. The patients usually get between 12 and 30 aligners, depending on their individual cases and the whole treatment course can last from 6 to 15 months. Patients are requested to wear the aligners for 22 hours per day, and they should not be worn during eating, brushing and flossing.