Drinking from a bottle all day and/or all night can cause tooth decay even in teeth that haven't emerged yet. Both breastmilk and formula have lactose in them which provides food for bacteria in the mouth and allow them to produce cavities.
In my case the baby is 1 month old. I find it difficult to feed her with a spoon single handedly hence restored to bottle feeding.
She feeds for around 10 minutes every two hours per day.
What care should be taken to prevent the tooth decay?