Dentists divide your mouth into four quadrants—upper left, upper right, lower left, and lower right. An initial deep cleaning treatment is typically priced per quadrant. Depending on the severity of your periodontitis, your dentist may also recommend that you receive a periodontal maintenance cleaning every four months, which will have an additional cost. Most dental insurances will cover the cost of deep cleaning as long as your dentist can provide proof of a periodontal disease diagnosis. Dental Depot also offers payment plans and financing options like CareCredit to help you afford the essential dental care you need.