Founded in 1952, the MASO has approximately 1,200 members in all categories and is a regional (constituent) association of the American Association of Orthodontists.

Included in its geographic area are the states of Delaware, District of Columbia, Maryland, New Jersey, Pennsylvania (east of the Alleghenies), Puerto Rico, U.S. Virgin Islands.

MASO holds its Annual Session in the fall each year in a location selected by the President and planning committee.

Mission Statement

The Middle Atlantic Society of Orthodontists shall:

  1. Promote the ethical delivery of quality orthodontic care by providing its members with educational opportunities and information regarding advances in orthodontic treatment and technology.
  2. Be an advocate for, and a representative of, all constituent members of the AAO for the purpose of making regional decisions regarding policy, budget, member services, public information and communication.