Light-activated bleaching techniques such as BriteSmile and Zoom are marketed as "breakthroughs" in the science of teeth whitening.
But are they any more effective than less expensive bleaching gels or over-the-counter white strips? Dentists weigh in.
white stripsA Simple Formula for Whitening Your TeethNPR Programs: Morning Edition Thu, 04/10/2008 - 1:04am
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