In a PPO Plan, you pay less if you use dentists that belong to the plan's network. You pay more if you use dentists outside of the network. Most dentists are in a PPO network and savings can be substantial.
Dental Health Maintenance Organization (DHMO) require you to choose a Primary Care Dentist for their list of dentists and you are only covered if you see that dentist or a referral from that dentist. In return, costs of services are relatively very low.
Members receive immediate, unlimited access to dental care at participating dentists at discounted, fixed fees that offer savings between 15% and 80% over a dentist's usual fees. This is not insurance.