Answered

Amalgam delayed expansion is one of the reasons why amalgam restorations fail. Which statement is not true about amalgam delayed expansion?

A. It can result in pain and cusp fracture.
B. Hydrogen gas is formed inside the restoration.
C. It occurs 3-5 days after amalgam insertion.
D. It results from saliva and copper reaction.



Answer :

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Final answer:

Amalgam delayed expansion can cause pain and cusp fracture in dental restorations. The incorrect statement about amalgam delayed expansion is clarified.


Explanation:

Amalgam delayed expansion can lead to various issues in dental restorations. One incorrect statement about amalgam delayed expansion is option D, as it is not the result of saliva and copper reaction. Instead, it is primarily caused by the formation of hydrogen gas inside the restoration, leading to expansion that can result in pain and cusp fracture. The expansion typically occurs 24-48 hours after the insertion of the amalgam.


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