Cold light teeth whitening has side effects, just small. Keep about 1-2 years, the price of 1-2000 more, the charges vary from place to place.
In fact, you can do the new cosmetic braces, do not need to grind the teeth, just impressions, two times to complete, probably within half an hour at a time.
The teeth are as white as you want them to be, and there are many color options.