As early as birth, our baby had her oral care. JD's mouth is being cleaned by the use of cotton balls dampened from the distilelled water. It was a bit tough cleaning her mouth though, pretty simple - it's because she has a tiny mouth making it hard to insert the pointing finger with a cotton, and the baby closes her mouth too as I cleanse it.
I already bought the silicon brush type - thought I can use it even JD is days old, but because her mouth is too small, I did not use it until she is 3 months old.
She's on her 10th month now, she has 4 teeth and so I brush her teeth regularly.
With the advice of a mother officemate, I bought a kiddie toothpaste, the one that is safe when swallowed - she told me to buy the Sansflou but was out-of-stock, so I decided to buy the Pigeon, a good brand. From the time being, I love brushing her teeth using the silicon brush and orange flavor Pigeon baby toothpaste. Funny though, my baby bites my finger every time I brush her teeth :) And when I am not at home, my mother does the brushing.
This is a good way to train your baby how to take care of their teeth and their oral hygiene as well.