Primary teeth are in danger for decay immediately after erruption! Amon the most common aggravating factors is a nutrition high in carbohydrates and sugar and the poor oral hygiene. In infancy, the most important factor in the development of dental caries is the use of babybottle beyond the age of one and a half years old especially if the child takes it to bed at night. In fact, in this tender age, dental decay can be very aggressive and spread quickly to almost all teeth. This is why even 2 year olds, often need filnigs!!