How does whitening work
Dental dyschromias can be classified in two ways: extrinsic or intrinsic. The intrinsic dyschromias are those spots that occur inside the tooth or those that affect the internal structure of dental tissues, these spots will be removed with Opalescence products but only in consultation treatments performed by the Dentist.
The extrinsic dyschromia’s are the stains that appear on the surface of the teeth and occur between the micro-cracks of the enamel and the depth of the dentin (the layer of the tooth under the enamel). Whitening toothpastes and mouth rinses can remove some of these extrinsic stains, but only professional whitening agents can remove the most difficult and deep stains.
The active bleaching agent (hydrogen peroxide or carbide peroxide) contained in Opalescence gels penetrates the enamel to reach the molecules responsible for the stains. The free radicals of oxygen released by the bleaching agent decompose these molecules (breaking the bonds that hold them together), making them invisible.