Dental PPOs usually indicate that they will pay a specific percentage of each category of care. For full coverage plans, “100/80/50” coverage is common. The plan covers 100% of preventative, 80% of basic, and 50% of major. Another way to express this is to say the patient pays 0/20/50. Understanding the basics of service categories and percentages is a good place to start with understanding plans, but keep in mind that companies often have a list of fine print exclusions, and most plans also have a yearly coverage maximum plus waiting periods.