Align Technology, Inc. designs, manufactures, and markets the Invisalign system, a method for treating malocclusion, or the misalignment of teeth. Invisalign corrects malocclusion using a series of clear, nearly invisible, removable appliances that gently move teeth to a desired final position. Because it does not rely on the use of metal or ceramic brackets and wires, Invisalign reduces the aesthetic and other limitations associated with traditional metal arch wires and brackets, commonly referred to as braces. The Invisalign system is regulated by the United States Food and Drug Administration (FDA) as a Class II medical device. The Company distributes majority of its products directly to customers, the orthodontist, and the general practitioner (GP) dentist. Its major products include Invisalign Full, Invisalign Express, Retention, Invisalign Teen, Invisalign Assist, and Ancillary and other.