My baby has brown stains on his front upper teeth since he was 9 months old.In fact the whole teeth are totally brown.His first tooth has a light brown discoloration all along the top of the tooth.

Some general tips for infant's teeth

1. Choose a time after feeding when your infant is not fussy or overly tired.
2. Continue wiping your child’s teeth until he has several teeth
3. After more teeth have arrived, begin using a soft bristle, child-sized toothbrush and water.
4. Ask your dentist if you need to add fluoride to your baby’s diet.  Fluoride prevents cavities and makes teeth stronger.
5. Cradle your infant’s head with one arm and wipe or brush with the opposite hand.
6. Place your infant on a changing table, bed, floor or lap.
7. Sing, talk and smile with your infant while cleaning their teeth.
8. Clean or brush your baby’s teeth twice a day.
9. Be an example; allow your infant to watch you brush your teeth. This helps teach the importance of good oral hygiene.