Smiles are one of the most important aspects of making a first impression. For those who are looking for a more youthful appearance, or those who simply want to improve their smile, professional teeth whitening might be a great and effective option. Why are my teeth stained? There are two categories of staining: extrinsic and intrinsic. The first referring to those that on the surface of the teeth, the later are formed in the interior of the teeth. There is…
