A dental bridge cannot decay, but the teeth beneath it are still prone to tooth decay. Be sure to avoid the following: Foods and drinks high in sugar: Sugary foods and drinks can leave behind particles that may breed harmful bacteria between or beneath dental bridges. It can cause your dental bridge to loosen or fall out. Acidic drinks: Coffee, soda, and other acidic drinks can erode your natural tooth enamel. In addition, they can stain your teeth. Sticky foods: Foods like caramel and gum can get stuck between your teeth and damage your bridge. Hard foods: Hard foods such as ice can crack your bridge if you bite down on them.