The American Dental Association (ADA) is a professional organization that promotes oral health and provides resources for dental professionals. It is the largest and oldest national dental association in the world, representing more than 161, 000 dentists. The ADA works to improve the public's oral health by providing information on tooth care and advocating for access to quality dental care. They also provide resources for dental professionals, such as continuing education courses and guidelines for best practices. The ADA is committed to promoting good oral health and helping people maintain healthy teeth and gums.