Extension of eligibility for benefits for covered services, usually designed to ensure completion of treatment commenced prior to the expiration date. Duration is generally expressed in terms of days.
A dental restoration made outside the oralcavity that covers one or more cusp tips and adjoining occlusal surfaces, but not the entire external surface. It is retained by luting cement. (American College of Prosthodontics; The Glossary of Prosthodontic Terms)