When and how should you begin taking care of your infant's teeth and gums? When should you start brushing? Tips to get them to brush and how to avoid a wrestling match. When should your infant see a dentist for the first time, is it determined by age or number of teeth? And, how do a pacifier, fluoride, breastmilk, formula, water, milk, and juice affect your baby's teeth? Dr. Rick Hernandez D.D.S. is this week's expert.