In order to get the results that you are after, you may need to bleach the rear side of your teeth.  Even though people do not typically look at the back side of your teeth, your teeth are translucent stains from the back side of your teeth  teeth can radiate through your teeth so that they can bee seen from the front side of your teeth.  Our bleaching trays are designed to provide effective coverage on both the front and back of your teeth.  Most other trays on the market have been designed to provide no coverage on the back side of your teeth.