Never fill a baby's bottle with sugary drinks, or dip in sugar, to encourage a toddler to drink. Over time, the exposure to high levels of sugar can damage tooth enamel and cause decay.
Always clean a baby's mouth with a clean, soft cloth after feeding to prevent bacteria building up. This should be done even before the first teeth emerge.
Never share eating utensils with an infant or clean a soother in your mouth as this spreads bacteria to the child's mouth.
It is extremely important to schedule a check-up with the dentist when the first teeth appear to ensure the teeth are healthy and developing properly and any possible problems are detected and addressed as soon as possible.
Read more at https://yourdentalhealthresource.com/top-tips-for-preventing-baby-bottle-tooth-decay/