Which Statement Is Correct Regarding Prefabricated Temporary Crowns

question 18

Multiple Choice

Which statement is correct regarding prefabricated temporary crowns?

• A)They can be used for posterior but not anterior preparations.
• B)They are available in cast gold.
• C)They are available in porcelain fused-to-metal.
• D)Crowns made of polycarbonate are used where appearance is important.

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Definitions:

Major Product

The product of a chemical reaction that is formed in the greatest quantity, as determined by the reaction conditions and mechanism.

HBr

Hydrobromic acid, a strong acid formed by dissolving hydrogen bromide in water, used in organic synthesis and as a catalyst.

Addition

A chemical reaction where two or more substances combine to form a single product, often involving the breaking of double or triple bonds.

Anhydrous HCl

Hydrogen chloride gas or any form of hydrochloric acid that does not contain water.