Perio Maintenance is exactly what it says: maintenance for perio gum disease. You should be doing a perio maintenance cleaning twice a year and a prophylaxis twice a year. Bright now has turned in with our insurance 4 times in one year a perio maintenance cleaning, which is only covered twice per year at 80% with a $50 deductible, leaving us paying for $109.00 for the two that are not covered when they could turn in regular cleanings twice a year and get 100% coverage. When I called the bright now on Wilmington pike Dayton Ohio; she says: that is corporate policy. let them know if we want to go someplace else.