Invisalign straightens crooked chompers with a combination of highly advanced, 3-D computer graphics and the spells of old-fashioned orthodontia. The Invisalign process eschews cumbersome braces for clear, removable aligners that are virtually invisible to the unclothed eye. An initial 60-minute exam, including x-rays and digital images of your mouth terrain, paves the way for a flurry of calibrated teeth sheaths that are designed to slowly shift walnut crackers into alignment. The total cost of an Invisalign treatment varies for each customer (running anywhere from $2,000 to $8,000); this Groupon gets you $1,000 toward that final cost. View some Invisalign FAQs here.