Oral functionality and appearance are important reasons for wearing a bridge. A bridge helps support your lips and cheeks. The loss of a back tooth may cause your mouth to sink and your face to look older.nnDental health is the most important reason for the bridge. Teeth were designed to complement each other. Unusual stresses are placed on the gums and other oral tissues when teeth are missing, causing a number of potentially harmful disorders.nnIncreased risk of gum disease has proven to be one of the worst side effects of missing teeth and can be minimized with a bridge.nnMissing teeth can cause speech disorders as they are used to make many of the sounds we use to speak clearly.