Zoom teeth whitening results can last anywhere from six months to two years, and dentists will usually recommend touch-up sessions (or at home kits) to help maintain your results longer.
Note that after getting your teeth professionally whitened, it's super important to not drink or eat anything rich in color. A good rule of thumb, as prescribed by Dr. Chern, is to avoid anything that could stain a white t-shirt. This is because your teeth are especially receptive to absorbing color following any whitening. Avoiding these foods and drinks in general can help prolong your white teeth, as well. As for cost, you can expect to pay between $300 and $700 depending on your location and dentist's pricing.
Image courtesy Wendy Gould
The answer to this question is entirely up to you. For me, I think it's worth the investment. I like the immediacy of the results and that they last for some time. If you're just kind of "meh" about the idea and are fine with your teeth, then there's no need. However, if you're someone who's always on the quest for whiter teeth (like me), or if you have stained teeth and want an instant refresh, or if you're planning a big event (say, a wedding), then you absolutely cannot beat in-office whitening. I give the treatment five out of five pearly white teeth.
Image courtesy Wendy Gould