A glowing smile charms irritable librarians, stern highway-patrol officers, and judges with highfalutin ideas about driving through the library. Flaunt your beaming beauty with today's Groupon: for $78, you get a PearlBrite teeth-whitening treatment at Aegis Laser Therapeutics (a $157.50 value, including GST).

The technicians at Aegis Laser Therapeutics perform an array of laser-based treatments, including PearlBrite laser teeth whitening. In one 20-minute session, bicuspids brighten 2–10 shades as a patented mouthpiece and foam strips coat mouth-pearls in a special whitening gel of hydrogen peroxide and pulverized angel halos. An LED light then activates the gel, unleashing free oxygen radicals that penetrate the enamel and dentin layers of teeth before binding to carbon-based molecules and prying off stains. The PearlBrite system is reported to cause no adverse side affects on healthy teeth and gums, as well as little to no discomfort beyond a slight tingling sensation and brief blinding sensation when smiling into a mirror after the treatment. Results can last from six months to two years based on oral hygiene habits and aftercare, for which PearlBrite manufactures touch-up pens and shine sprays (not included with today’s Groupon).

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