Unlike other common bleaching methods, Opalescence bleaching gel is a completely permanent option and only requires occasional at home maintenance. As for how white your teeth will get, deep bleaching with the Opalescence gel dramatically whitens teeth. The process has been known to lighten stained teeth 16 shades or more. Although it is important to note that every set of teeth is different and every patient is different. In general, though, the Opalescence teeth whitening system is able to noticeably whiten teeth without making them look unnatural. The end result with this product is never ultra-white, fake looking teeth, but rather natural, beautiful and bright looking smiles.