Abbreviation for Occupational Safety and Health Administration. Federal agency in the US responsible for making and enforcing employee safety regulations.
An intracoronal dental restoration, made outside the oralcavity to conform to the prepared cavity, which restores some of the occlusal surface of a tooth, but does not restore any cusp tips. It is retained by luting cement. (American College of Prosthodontics; The Glossary of Prosthodontic Terms)