The American Association of Orthodontists (AAO) is the world’s oldest and largest non-profit dental specialty organization. Founded in 1900, it currently represents more than 19,000 orthodontist members throughout the United States, Canada and abroad. Its headquarters is in Missouri. AAO is affiliated with the Canadian Association of Orthodontists (CAO).
The AAO Foundation, the charitable arm of the American Association of Orthodontists, provides support to orthodontic education programs and orthodontic research.