Invisalign is a new treatment for straightening teeth. The process uses transparent, removable teeth aligners that are custom-made to fit over the teeth. New aligners are made about every two weeks as the teeth shift and straighten. Invisalign is an effective alternative to dental braces, which cannot be taken off for eating or brushing teeth, as the aligners can be. They are also more discreet in appearance than are braces and serve a more aesthetic alternative.