Invisalign straightens crooked chompers with a combination of highly advanced, 3-D computer graphics and the spells of old-fashioned orthodontia. The process eschews cumbersome braces for clear, removable aligners that are virtually invisible to the unclothed eye. An initial 30- to 60-minute exam paves the way for a flurry of calibrated teeth sheaths with x-rays, photos, and impressions of mouth terrain, and a supplemental take-home whitening kit scrubs the yellowed brick road to a stunning drivers' license photo. The total cost of an Invisalign treatment varies for each customer (it can run anywhere from $2,500 to $4,500), but this Groupon also gets you $1,000 toward that final cost. View some Invisalign FAQs here.