. "Direct contact is commonly by kissing, so that oral flora is transmitted in saliva; indirect contact occurs via objects such as a cup, utensils, toothbrush, or even shared toys, which are contaminated with cariogenic bacteria. [12],[13],[14] The concept of dental caries as an infectious and transmittable disease was convincingly demonstrated by Keyes (1960). [15] Another aspect of oral hygiene pra" . . .