Losing a first tooth is an important sign that your children are growing up! The Canadian Dental Association (CDA) can send a special certificate to children who have lost their first tooth, as a way to celebrate this special event. To receive the Smile Certificate send an email to reception@cda-adc.ca that includes the following information: The child's first name. Indicate whether the child is a boy or a girl. The date on which the child lost the tooth. Your mailing address. You can also provide this information by telephone at (613) 523-1770 or by fax at (613) 523-7736.