DEA 0300 - Preventive Dentistry and Nutrition DEA 0300 - Preventive Dentistry and Nutrition Topics include hard and soft deposits, stains, oral hygiene instructions, plaque indices, fluorides, sealants, tooth brushing techniques, flossing, dentifrices, mouthwashes, oral hygiene aids and the oral hygiene needs to special care patients. Nutrition as it relates to dental care is also included in this course. Emphasis is placed on personal and patient oral hygiene skills development. Articulates with dental hygiene, DES1840. Post-Secondary Adult Vocational