Good oral hygiene removes bacteria and the leftover food particles that combine to create cavities. For infants, use a wet gauze or clean washcloth to wipe the plaque from teeth and gums.
Avoid putting your child to bed with a bottle filled with anything other than water as this could cause "baby bottle tooth decay". This form of decay is caused by frequent long exposure of an infants teeth to liquids that contain sugar. Among these liquids are milk (including breast milk), formula, fruit juice and other sweetened drinks.