The Canadian Dental Association (CDA) encourages the dental assessment of infants within 6 months of the eruption of the first tooth or by one year of age.

Getting an early start on dental care for your child is important. Limit the number of sugary treats you give your child, and focus on healthy food choices from the very beginning. Start cleaning your child’s mouth with a soft damp cloth before teeth come in and continue with a soft toothbrush once he or she has a first tooth.

Sources:

CDA