Eligible children will have access to a benefit cap of $1000 over a 2 year period.

To be eligible a child must be aged between 2 and 17 years and their family must receive Family Tax Benefit Part A or a relevant Australian Government payment (such as Medicare), the family gets certain payments for at least 1 day of the calendar year. 

For more information, please read the following: Child Dental Benefits Schedule

Reference:
The Child Dental Benefits Schedule, The Department Of Health