Like brackets and arch wires are to braces, Invisalign aligners move teeth through appropriate placement of controlled force on the teeth. The principal difference is that Invisalign not only controls forces, but also controls the timing of the force application. At each stage, only certain teeth are allowed to move, and these movements are determined by the orthodontic treatment plan for that particular stage. This results in an efficient force delivery system.
Invisalign uses 3-D computer imaging technology to depict the complete treatment plan from the initial position to the final desired position from which a series of custom-made, clear “aligners” are produced. Each “aligner” moves teeth incrementally and is worn for about two weeks, then is replaced by the next in the series until the final position is achieved.