Have you been to the dentist and provided your Extended Health Care coverage information, and still was advised you have an additional out-of-pocket fee to pay?
Dentists are provided a Dental Fee Guide by the Ontario Government and are given a guideline to bill their patients accordingly.  However, some dentist may decide to charge over and above this guideline, and that's when you may be presented with an additional charge.
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Insurers will only pay the amount stated in the current Dental Fee Guide.

It's a business, just like any other.  In order to avoid the additional charge become a savvy consumer, ask your dentist if they charge according to the Dental Fee Guide.  If they charge above, have a conversation with them advising that you can only afford their service if it's fully covered under your plan.

See Dental Fee Guide 2017 http://www.health.gov.on.ca/en/pro/programs/dental/docs/hso_services_fees_dentist.pdf
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