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MDA Chapter 43 multiple choice graded A+

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MDA Chapter 43 multiple choice graded A+

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MDA Chapter 43 multiple choice
graded A+ 2025/2026

Which professional organization evaluates a new dental material? - CORRECT ANSWER ✔✔ADA



What type of reaction does a dental material undergo when a person is chewing? - CORRECT
ANSWER ✔✔Compressive stress



What happens to a dental material when it is exposed to extreme temperatures of hot and then
cold? - CORRECT ANSWER ✔✔Contraction and expansion



Which is an example of how galvanic action can occur? - CORRECT ANSWER ✔✔Salt and saliva,
Touch of two metals



How does an auto-cured material harden or set? - CORRECT ANSWER ✔✔Chemical reaction



Select the correct makeup of the alloy powder in amalgam - CORRECT ANSWER ✔✔Silver, tin,
copper, and zinc



Why is dental amalgam not placed in anterior teeth? - CORRECT ANSWER ✔✔Esthetics



Most amalgams have a high copper content. What does copper provide to amalgam
restorations? - CORRECT ANSWER ✔✔Strength and Corrosion resistance



Where are amalgam scraps disposed of? - CORRECT ANSWER ✔✔In a biohazard bag

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