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What should accompany the delivery of any type of crown from the dental laboratory and be placed into the patients file?
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What information is on the certificate?
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Ch 11 Metals

QuestionAnswer
What should accompany the delivery of any type of crown from the dental laboratory and be placed into the patients file? Certificate
What information is on the certificate? Materials(name of alloy), Composition, ADA classification (color coded based on noble metal content), &Manufacturer
What is the name of the process for melting metal to make a crown Casting
What is the difference between noble, high noble and base metals? o High noble 60% , 40% of which must be gold, expensive o Noble alloys 25% noble elements with no gold requirement o Base-metal alloy-less than 25% of noble
Discuss biocompatibility of metals? Base-metal alloy potential biocompatibility problems
What is an alloy? Metal is made by combining two or more metals, esp to give greater strength or resistance to corrosion.
What is a significant characteristic of a noble alloy? o Does not easily corrode o Superior in resistance to corrosion or oxidation
List three uses for base metals? o Important for partial denture framework o Casting alloys/Porcelain bonding alloys o Ortho appliances
What are the two most common base metal alloys used in dentistry? o Chrome-cobalt and Nickel-chrome
What are two disadvantages for working with base metals? o High casting temperatures and biocompatibility problems
What are three advantages of base metals? o Lighter, Stiffer - Take twice the stress to deform the base metal, and Cost less
How are wrought metals different from casting alloys? o Wrought metals are formed after the metal is cast, and used to describe the shaping, altering, molding, and manufacture of various metals.
Which metal has the highest incidence of metal allergies? Nickle
Created by: RDHSeattle
 

 



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