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SDDAADA Login Assistance Water Fluoridation Supported by the South Dakota Dental Association Dental Employment Opportunities Be Well Opening the Door to Medicaid Welcome to the South Dakota Dental Association. The South Dakota Dental Association is the membership organization of dentists and allied dental staff in South Dakota. The SDDA has nearly 500 dentist members and more than 500 allied dental staff members statewide. Founded in 1883 the SDDAs mission is to promote the art and science of dentistry and the oral health of the public educate the public on the benefits of quality preventive and restorative dentistry as provided by the entire dental health care team and be of service to its members regarding practice health and their general welfare.