title: An ultrasonic investigation into the working time of amalgam.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003723:Dental Amalgam / Q000378:metabolism / Q000592:standards; D003799:Dental Stress Analysis / Q000295:instrumentation; D004548:Elasticity; D013499:Surface Properties; D013997:Time Factors; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation
chemical_list: D003723:Dental Amalgam