Sponsored by The Dental Spa, Teeth Whitening Philadelphia
Teeth lose their white color owing to debris and stains. The debris from what we drink and eat enters the micro-cracks on tooth enamel. And stains from the colored food and drink that we consume stick to the tooth enamel surface. Finally, factors like aging, certain drugs, acid attacks from sugar and trauma from falls and injuries result in stains behind the enamel.
The surface stains are “extrinsic” stains. The stains behind the enamel are “intrinsic” stains. Extrinsic stains can be mostly removed by regular use of whitening toothpastes and chewing gums. However, these have no effect on the intrinsic stains or even the stubborn extrinsic stains that have worked their way into the teeth enamel.
Removing the Persistent and Intrinsic Stains
Hydrogen Peroxide, a powerful oxidizer, is the standard agent used to remove the hard-to-remove stains. It might be administered as such, or in its more stable carbamide peroxide form (which breaks down into hydrogen peroxide).
Hydrogen peroxide breaks down into water and hydroxyl ions. The ions work their way through the dentinal tubules (dentin is the core tooth, yellowish in color, protected by the white enamel covering it), attaching themselves to the stain particles. The ions so attached to the stain particles break them apart, effectively removing them.
With the intrinsic stains that were showing through the enamel earlier thus removed, the teeth regain their white color and you get your white smile back.