Q. Hello, I have a question about teeth whitening. 3 months ago I went to a dentist and had them perform the “Zoom” teeth whitening treatment. My teeth prior to the zoom were yellow (pretty bad). Yet after the two hour treatment I had movie star whiteness to my teeth!. There was a difference of about 11 shades at least. They were as white as can be for a few days, however, I then started to have some serious regression. Now mind you that I used to be a tea drinker and smoker, but never over the past 2 years have I had a cigarette, or any alcohol, nor tea, nor coffee, or anything that would case my teeth to stain. Therefore, the regression my teeth were going through had nothing to do with those substances that darken your teeth. So since the three months since I had the Zoom treatment done my teeth are brighter (about 5 shades) than the yellow teeth I had before, but there is still a yellow tint to them, and they are nowhere near the level I had when I had that bright hollywood style for the first few days after I left the dentist following my Zoom treatment. So my question is…is there anyway I can not only achieve but also maintain that bright smile for long durations, like months a year at a time. I did also buy a take home bleach kit from the same dentist to try and help maintain my pearly white teeth, but the kit only gets my teeth a few shades whiter, which only lasts for 12 hours before the whiteness is gone and it goes into regression. Please help, all the treatments I’ve tried have only got my teeth white temporarly. And thank you for taking the time to read this doctor.,