If you've ever assessed your smile in the bathroom mirror and pronounced it a little lacking in luster, you're not alone. However diligent we are in our oral-care regimen, regular tooth-brushing doesn't guarantee an ivory set of pearly whites. Coffee, tea, cigarettes, various foods, and some medications can stain our teeth to a muted yellow or brown, the sort of deep enamel or sub-enamel discolorations against which toothbrush bristles do little good. If a yellowed smile knocks your self-esteem, you may consider the various tooth-whitening products on the market for home use. Among the many leading brands and styles Walgreens stocks are Crest Whitestrips. These pliable strips apply a special gel formulated with hydrogen peroxide that, through the oxidation process, removes stains both on the surface of your teeth as well as deeper in the enamel. This bleaching process is analogous to that employed in tooth-whitening procedures in dental clinics. The array of Crest Whitestrips products sold by Walgreens covers a broad spectrum of whitening strengths, allowing you the ability to choose one best suited to your individual needs.
Teeth Whitening at Home
The Crest Whitestrips whitening gels tackles both of the major kinds of stains that typically discolor your teeth. Surficial discolorations, or "extrinsic stains," reside in the outer coating of the enamel--the tooth pellicle--and can sometimes be enhanced through the mechanical scrubbing of toothbrushes or the chemical action of whitening toothpastes. Deeper stains within the enamel interior and at the margins of the dentin, which lies beneath the enamel, are "intrinsic," developed over long periods of time through food and beverage consumption and the ingestion of some medications. Intrinsic stains are more damaging than their surficial counterparts, and can generally only be eliminated through the use of bleaching and other specialized whitening procedures. The relative amount of hydrogen peroxide--which appears to oxidize both intrinsic and extrinsic stains and thus eliminate their discoloration--within a particular bleaching formulation helps to determine the degree of that formulation's whitening ability. Different Crest Whitestrips products vary in the amount of time they require to produce results, and include faster-acting formulations that may whiten teeth within mere days of the first application.