Source:http://linkedlifedata.com/resource/umls/id/C0184059
UMD: Horseshoe shaped receptacles made of metal or other suitable material used to carry the impression material to the mouth, to confine the material in opposition to the surfaces to be recorded, and to control the impression material while it sets to form the impression.,SPN: A preformed impression tray is a metal or plastic device intended to hold impression material, such as alginate, to make an impression of a patient's teeth or alveolar process (bony tooth sockets) to reproduce the structure of a patient's teeth and gums.