What is Invisalign: Invisalign is an invisible aligner designed and manufactured by Align Technology in North America, which can meet the need for straightening teeth while avoiding the disadvantages of traditional braces that can be seen in “steel teeth”. It is the most advanced orthodontic method on the market in 2013. Patients only need to wear one clear brace to gradually straighten their uneven teeth. Benefits: Precise orthodontic results, customized plan to align your teeth, and computerized 3D shaping assisted design that exactly follows your dental model. Caution: Wearers wear the aligner for most of the day, 24 hours a day, except when eating, drinking, brushing and flossing. The aligners are worn for at least 22 hours a day and then replaced with a new set of aligners every two weeks. The average patient’s course of treatment lasts 12 to 18 months, depending on the patient’s dental condition.