According to the Government of Ontario website, Healthy Smiles Ontario is a government-funded dental program that provides free preventive, routine, and emergency dental services for children and youth 17 yearsold and under from low-income households.

Who is eligible?
Children are automatically enrolled if they receive Temporary Care Assistance or Assistance for Children with Severe Disabilities funding.  They are also enrolled if they or their family receive Ontario Works or Ontario Disability Support funding.

The funding can also be applied for if the child is under 18, lives and Ontario, and the family income meets the requirements of the table below:

Number of dependent
children in your household
Family net income
1 child$23,170 or lower
2 children$24,924 or lower
3 children$26, 677 or lower
4 children$28, 431 or lower
5 children$30,185 or lower
6 children$31,939 or lower
7 children$33,692 or lower
8 children$35,446 or lower
9 children$37,200 or lower
10 or more children$38,954 or lower. Add $1,754 for each additional dependent child to determine the income level at which your family would qualify for Healthy Smiles Ontario.

What is covered? 
The program includes regular visits to a licensed dental provider and covers the costs of treatment including:
-fillings (for a cavity)
-tooth extraction
-urgent or emergency dental care (including treatment of a child’s toothache or tooth pain)

Cosmetic dentistry, including teeth whitening and braces, are not covered by the program.

Government of Ontario website

How do I apply? 
You can apply online, or download, print, and complete the application form, which can then be mailed to:
Healthy Smiles Ontario
33 King Street West
PO Box 645
Oshawa, ON
L1H  8X1