Chapter 4 J: CR

Question 1

When would you choose amalgam rather than composite?

A. In an occlusal caries of a 36 in a bruxism patient

B. In a Class IV of a lateral incisor

C. In a class III in the mesial aspect of an upper canine

D. All from above

Answer 1

A

Question 2

Which of the followings is not a component of composite?

A. Inorganic matrix: Bis-GMA polymer

B. Inorganic particles: silicon dioxide

C. Binding agents such as silanes

D. Camphorquinone as a polymerization initiator

Answer 2

A

Question 3

Which of the following are the most serious problems of the composite resins?
A. Fatigue
B. Wear
C. Polymerization shrinkage
D. Gap formation

Answer 3

C

Question 4

Identify the incorrect statement about composite resins?

A: Composite resins are developed in the 70’s

B: They were well received despite the effectiveness of the previous materials posterior

C: They were accepted for anterior segments but not for posteriors for a long period
of time

D: A and B

Answer 4

D

Question 5

Which of the following problems of composite resin are not from the material?
A: fatigue
B: color change
C: defect of polymerisation
D: degree of conversion

Answer 5

C

Question 6

The description “due to the repeated impact of the antagonistic cusp and thermal changes” corresponds to which of the following problems of the CR?

A: fatigue
B: color change
C: degree of polymerisation
D: degree of conversion

Answer 6

A

Question 7

Which of the following is a consequence of polymerisation shrinkage of CR?
A: micro-filtration
B: gap formation
C: cusps and enamel reconstruction
D: all of the above are consequences of shrinkage

Answer 7

D
Not so sure

Question 8

Identify the incorrect statement about composite resins?
A: composite resins were developed in the 60s
B: they were well received despite the effectiveness of the previous material
C: they were accepted for anterior segments but not for posteriors for a long period of time
D: A and B

Answer 8

B