The Wisconsin Dental Association, with 3,100 member dentists and a number of dental hygienists, is the leading voice for dentistry in Wisconsin. WDA members are committed to promoting professional excellence and quality oral health care. Established in 1870, the WDA is headquartered in West Allis and has a legislative office in Madison. The WDA is affiliated with the American Dental Association - the largest and oldest national dental association in the world.