Please refer to www.aapd.org/pediatricinformation/faq.asp for answers to your questions: 

What should I use to clean my baby's teeth?
When should I take my child to the dentist for the first check-up?
What is the difference between a pediatric dentist and a family dentist?
How do I find a pediatric dentist in my hometown?
Are baby teeth really that important to my child?
What should I do if my child has a toothache?
Are thumbsucking and pacifier habits harmful for a child's teeth?
How can I prevent decay caused by nursing?
How often does my child need to see the pediatric dentist?
Toothpaste: when should we begin using it and how much should we use?
How do I make my child's diet safe for his teeth?
How do dental sealants work?
How do I know if my child is getting enough fluoride?
What can I do to protect my child's teeth during sporting events?
What should I do if my child falls and knocks out a permanent tooth?
How safe are dental X-rays?
How can parents help prevent tooth decay?