Invisalign uses a series of clear aligners that are custom-molded to fit your mouth. The virtually invisible aligners gradually reposition your teeth into a straight, healthy smile. Invisalign has no metal bands or wires to trap food and plaque. For some people, incorrectly positioned teeth and jaws can exacerbate speech difficulties and chewing problems. Correcting your bite by straightening your teeth can help improve both. Properly aligned teeth can also be less stressful on supporting bone and jaw joints.