In addition, saliva can more easily find its way beneath whitening strips, diluting their potency. Some whitening strips aren't long enough to cover a wide smile, and they tend to slip and slide. Crest Whitestrips Supreme, containing 14 percent hydrogen peroxide the highest dose currently available in whitening strips are dispensed at dentists' offices.
These strips are wide enough to cover up to six teeth. Approximate cost for a box of 84 strips (three-week supply): $44.98.
Over-the-counter whitening strips cost in the $19.98 to $44.99 range.
Pens with brush-on or foam-tip applicators provide what has been billed as fuss-free instant whitening.
Used directly after meals or in daily regimens, as alternatives to whitening trays and strips, these whiteners are often considered instant 'antidotes' to new stains from food, especially just-consumed red wine.
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