For Delta Dental's Preventative Plan, there is no waiting period. Preventative services, including cleanings, X-rays and sealants, are covered by Delta Dental at 100%, meaning you'll pay nothing for these services. However, you'll have to pay fully out of pocket for most restorative and major services such as fillings, crowns and bridges under this policy. If you're looking for an affordable plan that saves you money on basic dental services, this may be a good option for you.