Sigma Phi Alpha, Dental Hygiene Honor Society, 1977-present. Washington Dental Hygienists' Association, 1980-present. BACK TO THE TOP References Available upon request. Oral biology is concerned with the nature of the orofacial tissues and with the application of basic scientific knowledge to orofacial tissues in health and disease. Dental hygiene is the area of dentistry that focuses primarily on prevention of oral diseases, treatment of conditions of the periodontium, and oral health education.
Dental hygiene is a prevention oriented profession.