DESPITE a $5 billion Coalition plan to subsidise dental services, the nation's dentists have backed the Greens' policy.

Health Minister Sussan Ley has pledged a national scheme to provide dental care to children aged up to 18 and five million concession card holders.

It would scrap Labor's child dental benefits scheme, in a move Labor says is a $1 billion funding cut, and fund only "clinically necessary" services.

Labor is yet to release a dental policy and the Australian Dental Association has thrown its weight behind the Greens' $6.6 billion plan.

The minor party has promised to expand Labor's scheme to cover all "full benefit" welfare recipients, seniors and concession card holders.

ADA president Dr Rick Olive said the Greens' policy "mirrored" the association's election policy.