What besides my insurance can save me $$$ at the Dentist?

Are there other plans for dental co-insurance that work WITH my dental insurance (EDS) to save my family money? Please leave links if possible.
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Some employers allow for money to be set aside from your check pre-taxed that you can use on any medical/ dental expense. This sometimes helps, but the best way to save money is to invest time in prevention and learning. Sonic Care or Oral B make very good brushes that seem expensive (~$100) until you think about how much you save by eliminating/ preventing one cavity ($200-$300 for a filling)
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