Our before and after teeth whitening photos show great results using our treatments. It is important to set the expectations of teeth whitening. Not all customers will have pearly white teeth in just one session, however, you will get results. How much you whiten really depends on a multitude of factors. Factors such as how stained the teeth are prior to whitening, what kind of staining agent caused the stains, and how much a person’s enamel reacts to the peroxide gel and the concentration of the gel.