Supplemental dental insurance is an individual or family insurance policy purchased to cover a portion of the dental costs. Supplemental dental insurance will normally not cover the entire dental care procedure. If you have a primary dental insurance plan that you purchased or your employer provided, the supplemental dental policy typically covers the remaining dental bill.
For example, if the dental plan policy covers half of the dental cost, the secondary or supplement dental insurance plan should cover the remaining balance of your dental procedure. A supplement dental insurance plan may also be purchased to cover the dental charges when there are annual dental benefit plan limits or exclusions.