NADP claims 70% of dental plans are PPO. $230 and $430 per year Source1 100-80-50 structure cover only 50% cover only 50% 100-80-50 structure coverage cover only 50% according to Bankrate Bankrate: Is Dental Insurance Worth the Cost? Is Dental Insurance Worth The Cost? Bankrate.com. "100-80-50" coverage. $1,500 or less in spending figures Bankrate.com $350 per year $544 on out-of-pocket dental expenses bankrate.com $200 and $400 annually