Nursing bottle decay is a pattern of cavities that appear in infants or very young children, often despite a parents best efforts to take care of the teeth. The most common cause is the night-time or naptime bottle containing milk or juice. The liquid itself or the sugary saliva rests in the mouth while the child is sleeping and works away at the enamel of the teeth. If your child needs a bottle at bedtime it should contain only water.
Having decayed teeth untreated can result in a number of unpleasant and undesirable consequences. Underlying permanent teeth can be damaged or the space necessary for permanent teeth to grow can be lost.
Ideally, you should pick up the tooth by the crown (top) of the tooth, rinse it and gently place the tooth back in the socket. Hold the tooth in place with gauze and take the child immediately to the dentist. However, most parents would find this very difficult to accomplish. Have the child bite on a piece of clean gauze or a washcloth and place the rinsed tooth in milk and head for the dentist. Above all, remain calm and try to keep your child calm too.