[1] Among the aims of the NDA is extending dental treatment and education to impoverished, disabled or minority populations, as well as those who may not be able to seek proper care due to age.

The organization continued to expand, including a 1928 affiliation with the recently formed Commonwealth Dental Society of New Jersey.

[3] During the Civil Rights Movement, the NDA was active in encouraging reform, demanding that dental schools and professional organizations stop discrimination.

[4] In 1965, the American Dental Association changed its policies to urge the cessation of discrimination based on race, religion, ethnicity or creed among its member groups and affiliates.

[1] In addition, members of the NDA are active in outreach, providing dental screening to children and offering services to residents of Jamaica, Trinidad and Guyana.