Lifestyle plays a bigger role in the health of teeth and gums than genetics for most people. You may find, however, that certain teeth problems are due to your DNA. The University of Pittsburg School of Dental Medicine completed a study that showed tooth decay and gum disease do have a genetic component. While some 14,000 Americans have mutated genes that affect the protecting layer of enamel on the teeth, making the teeth look yellow, brown or gray. To know for sure, visit one of the best dentists in New York.