Bleaching or teeth whitening is often a good first step for patients who have nice teeth that are slightly discolored. Often, people who drink coffee, drink tea, or use tobacco products develop a yellowish tinge on their teeth over many years. If they can abstain for awhile after using a bleaching service, then teeth whitening can leave their teeth many shades whiter. Dr. Aron Geelan, DMD is a cosmetic dentist located in Downtown Portland who offers his patients cosmetic dentistry that can give them the happy smile they deserve.