What is the difference between teeth whitening & teeth bleaching?

Whitening is the umbrella term whereas bleaching is one form of whitening. The terms whitening and bleaching are often used interchangeably, however, there is a technical difference. Whitening is used to describe the process of restoring your teeth back to their natural colour. On the other hand, bleaching refers to the process of whitening your teeth beyond their natural colour.

Teeth can be whitened by physical removal of superficial stains using abrasive agents such as toothpaste or prophy paste and also by bleaching processes, which rely on chemicals to penetrate enamel and dentine.