The American Academy of Pediatric Dentistry and the American Dental Association recommend that a baby get her first visit to the dentist after the first tooth emerges, no later than her first birthday. The dentist will check for signs of tooth decay or other oral problems.  Additionally, the dentist can teach you how to better care for your baby's teeth.  Try to take your child to the dentist every six months. If your infant has no teeth, use a clean, damp cloth to wipe her gums down after a bottle. This process will remove the damaging bacteria and help prevent the sugar from formula or breast milk from getting trapped in between your baby's lips and gums. Even if your baby does have a few teeth, wiping out her mouth after each feeding can help prevent tooth decay. If your infant has any emerged teeth, use a child-size toothbrush and kid-friendly toothpaste to clean her mouth twice each day, particularly prior to bedtime. Only use a little bit of toothpaste, about as much as a grain of rice, until she is about 3.  Be sure to be gentle with young teeth. Brush both the teeth and gums and then rinse out your baby's mouth. Once a child has reached three, you can use a pea-sized amount of toothpaste.  Make sure the toothpaste you use has fluoride, as that will help protect your child's teeth.

TL;DR in Indonesian:
Bawa bayi ke dokter gigi. Usap gusi bayi setelah menyusuinya. Sikat gigi bayi.