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
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
