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Dental Amalgams

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Questions and Answers

Which element is NOT typically found in dental amalgam?

Zinc (correct)

Tin

Copper

Silver

What are the main types of dental amalgam based on copper content?

Admixed and modifiable

Low-copper and admixed

Lathe-cut and spherical

High-copper and low-copper (correct)

In what dental procedures is dental amalgam commonly used?

Class I and II fillings

Crown and bridge preparations

Filling of root apices

All of the above (correct)

Which of the following is a disadvantage of amalgam restorations?

Not aesthetically pleasing Signup and view all the answers

Which component of dental amalgam increases hardness and strength?

Copper (Cu) Signup and view all the answers

Which phase in the Low-Copper Amalgam is the strongest and most corrosion resistant?

Ag3Sn Signup and view all the answers

What is the composition of the High-Copper Amalgam?

Ag-Cu and AgSn Signup and view all the answers

What happens during the trituration process in the Low-Copper Amalgam?

The surface oxides on alloy particles are removed Signup and view all the answers

Which phase decreases with time due to corrosion in the Low-Copper Amalgam?

Sn8Hg Signup and view all the answers

Study Notes

Dental Amalgam

Zinc is NOT typically found in dental amalgam.
Based on copper content, the main types of dental amalgam are:
Low-Copper Amalgam
High-Copper Amalgam
Dental amalgam is commonly used in:
Fillings
Restorations
Bonding
A disadvantage of amalgam restorations is:
Mercury toxicity
The component that increases hardness and strength in dental amalgam is:
Copper
In Low-Copper Amalgam, the strongest and most corrosion-resistant phase is:
Gamma-1 phase
The composition of High-Copper Amalgam is:
High copper alloy (6-30%) + mercury
During the trituration process in Low-Copper Amalgam, the:
Alloy powder reacts with mercury to form a mixture of gamma-1 and gamma-2 phases
In Low-Copper Amalgam, the phase that decreases with time due to corrosion is:
Gamma-2 phase

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Description

Test your knowledge on dental amalgams and their properties in this quiz. Learn about the major elements, types of amalgams, handling techniques, and setting reactions. Perfect for dental students and professionals.