It is like any other bracing technique to make the teeth straight. Just like the metal braces they give pressure for the teeth to get aligned properly in the right place. The movement of the teeth is also very slow so that the person wearing it is not even aware that the teeth are moving. Most orthodontists are using the invisalign to improve the face value of their patients. They take the impression of the teeth just as they would for the metal braces. Pictures are taken from multiple angles. Even a 3-d model of the set is taken with the help of the CT scanner. This ensures that the specifications are exact. The treatment takes as much as 6 months to 2 years. It depends on the way the patient reacts to it. For the patient it is good as they can continue with their normal lifestyle even if it takes longer for the teeth to come into position. There is no embarrassment either at any social functions, which is a relief for many patients. They can be removed when the person has to brush the teeth. The professional orthodontist ensures that the patient visits him from time to time to assess the improvement of the treatment. It is a healthy technique for overall dental care. Find out about the treatment costs online to know more.