Founded in 1900, the American Association of Orthodontists (AAO) is the world's oldest and largest dental specialty organization. It represents nearly 19,000 orthodontist members throughout the United States, Canada and abroad. All orthodontists are dentists and may simultaneously hold membership in the American Dental Association. Its headquarters are in Creve Coeur,

Missouri Missouri is a state in the Midwestern region of the United States. Ranking 21st in land area, it is bordered by eight states (tied for the most with Tennessee): Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas t ...

, near

St. Louis St. Louis () is the second-largest city in Missouri, United States. It sits near the confluence of the Mississippi and the Missouri Rivers. In 2020, the city proper had a population of 301,578, while the bi-state metropolitan area, which e ...

. Orthodontists are dental specialists in the diagnosis, prevention, and treatment of orthodontic problems who have completed two to four years of advanced training in an accredited orthodontic residency program. Only those dentists who have completed this training may call themselves "orthodontists," and only orthodontists may be members of the American Association of Orthodontists. In 2013 Gayle Glenn was elected as the first female president of the American Association of Orthodontists. AAO is affiliated with the

Canadian Association of Orthodontists The Canadian Association of Orthodontists (CAO; French: ''Association canadienne des orthodontistes'', ACO), founded in 1949, is the Canadian national organization of educationally qualified orthodontic specialists. Its headquarters are in Markham ...

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Official website

Member website
Orthodontic organizations Dental organizations based in the United States Medical and health organizations based in Missouri 1900 establishments in Missouri {{US-health-org-stub

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