If you want to whiten your teeth, there are two ways: the first way is through the restoration method, the original teeth grinding small, do veneer or porcelain teeth, all-porcelain dental restoration, this method can make the whole mouth multiple teeth color to achieve unity, more beautiful, but the disadvantage is that the cost is relatively high, there is damage to the teeth; the second way is through the teeth whitening treatment, can be in the hospital for teeth cold light whitening, can also be at home for home whitening, generally this method whitening need more times, longer, and after whitening easy to eat dark food teeth staining, may need to whitening again.