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Dental Amalgam. Pustaka : Anusavice : Phillps’ Science of Dental materials Combe E.C. : Notes on Dental Materials. Endanus Harijanto. Overview. Basic composition Basic setting reactions Classifications Manufacturing Variables in amalgam performance Material related variables
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Dental Amalgam Pustaka : Anusavice : Phillps’ Science of Dental materials Combe E.C. : Notes on Dental Materials Endanus Harijanto
Overview • Basic composition • Basic setting reactions • Classifications • Manufacturing • Variables in amalgam performance • Material related variables • Dentist controlled variables
Objectives • Know the advantages and disadvantages of amalgam • Know the classification and understand the amalgamation process of each type of amalgam • Know how to control the quality of amalgam • Know the recommendationsin mercury hygiene
Definitions (1) • Amalgam = an alloy of mercury and one or more other metals • Dental amalgam is produced by mixing liquid mercury with solid particles of an alloy of silver, tin, copper, and sometimes zinc, palladium, indium and selenium.
Definitions (2) • Trituration • Amalgam alloy is mixed with mercury. “Amalgamation Process” • Mercury dissolves the surface of alloy particles a composite plastic mass (some new phases form). • Setting and hardening occur as the liquid mercury is consumed in the formation of new solid phases.