Many experts recommend breast-feeding over bottle-feeding for the overall health of your child. However, breast-feeding can lead to Early Childhood Cavities in the same way that bottle-feeding can. 
To prevent Early Childhood Cavities: Avoid letting baby walk around with a bottle.
Avoid overnight feeding.
The Indian Dental Association recommends that you encourage your child to drink from a cup by his or her first birthday.
Is it Okay if My Child Sucks his or her Thumb? Thumbsucking is normal for infants; most stop on their own by age 2.
If your child sucks his or her thumb beyond age 2, try to discourage it by age 4.
Thumbsucking beyond age 4 can lead to crooked, crowded teeth and/or bite problems.
Is it Okay For My Baby to Use a Pacifier? Yes, but don't dip it in sugar, honey, or sweetened liquid. In addition:
Try to have your child give up the pacifier by age 2.
Keep in mind that while a pacifier and thumbsucking create no health difference for the child, a pacifier may be a better choice because it can be easier to wean your child from a pacifier than from thumbsucking.
What is the Best Way to Brush a Toddler's Teeth?
Use a small, soft-bristled brush. Use a circular or wiggling motion on all tooth surfaces, especially where the tooth meets the gumline. Once your toddler is able to spit out, use a pea-sized amount of fluoride toothpaste on the brush. Families should ask their dentist to demonstrate proper toothbrushing during the child's dental visit.
Can I Transmit Harmful Bacteria That May Affect My Baby's Teeth?
Yes. Cavity-causing germs can be transmitted through contact – like when baby puts hands in your mouth, and then in his or her own mouth. That's why it's so important to keep your own teeth and gums healthy.
In addition, research has shown that since a pregnant woman shares blood with her unborn baby, any infection of the mouth – such as a cavity or gum (periodontal) disease – can affect the baby.
When should I Start Using Fluoride Toothpaste for My Child?
When your child is able to spit. Fluoride is safe and necessary to keep teeth strong, but only at appropriate levels.