Student membership in the American Dental Hygienists' Association, is the 2nd most important step (after getting accepted into dental hygiene school!) to becoming a consummate dental hygiene professional! Student membership in ADHA represents student voices from across the country. Membership is open to all students enrolled in entry level and graduate level dental hygiene programs. Plan to visit this page often to take advantage of the numerous opportunities extended to student members in ADHA as well as the California Dental Hygienists' Association.