Having a bright, beautiful, white smile is something we all desire. It signals health and prosperity and leaves the best possible first impression a person can make. There are a host of products at the drug store that label themselves “whitening.” Whitening toothpastes, whitening mouth rinses, whitening strips, gels and creams all line the shelves, promising a “new you!” Your dentist, however, offers something labeled as “bleaching.” So what’s the difference? Which should you choose?
Your natural tooth is made up of two specific layers: enamel and dentin. The enamel layer is on the outside of the tooth. It’s the white part we see when someone smiles. It’s hard and heavily mineralized and can appear like porcelain. The dentin is the inner layer. It’s yellow in color and supports the enamel on the outside. Over time, your enamel naturally wears away and the yellow dentin color can begin to show through.
The term “whitening” is applied to any product that helps restore teeth to a natural color by removing debris and stains from a natural tooth’s surface. Any substance that restores the surface of a tooth’s enamel is a whitening product. Many whitening products contain a mild abrasive that removes leftover discoloration and food particles, leaving the enamel of the tooth smooth and white. Teeth whitening products combat stains caused by ageing and the discoloration left by many foods, or by smoking.
The FDA permits the term “bleaching” only for products that can whiten a tooth beyond their initial, natural color. Bleaching products contain active ingredients such as carbamide peroxide or hydrogen peroxide. The peroxide is activated so that it releases oxygen molecules that enter the tooth enamel and break down stains in a way that whitening products cannot. This activation can occur immediately, in the case of some in-office bleaching products, like laser whitening, or it can take several hours, as it can with custom take-home bleaching trays.
If you are considering brightening your smile, talk to Louisville teeth whitening dentist Dr. Smythe to see what product is best suited to your smile needs!
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