CDA, California Dental Association
http://cda.org

CDA Cares
http://www.cdafoundation.org/give/volunteer/cda-cares-free-dental-clinics

CDA Foundation
http://www.cdafoundation.org/

ADA, American Dental Association
http://www.ada.org

AAE, American Association of Endodontists
http://www.aae.org/