Hello, Ross! Everyone has different happits (smoking cigarettes, drinking coffee, drinking sodas, etc.) so the length of time that they will remain white depends on your own personal habits. Anywhere from 8 months to a year and a half is a good general estimate for most clients. Having white teeth takes maintenance just like going to the gym or tanning which we explain during your procedure, but as long as you practice upkeep it could even last longer than two years. Yes, we are licensed and certified. We have been in business for 11 months this month, and have not had a single dissatisfied client out of the 250+ clients that we have seen. We can give you as many referrals as you wish if you would like to give us a call at (806) 676-9028.
Thank you for your interest,
White Done Right Teeth Whitening
Oct 16, 2012