NDBE Part II - 2009 Exam B| QUESTIONS
AND ANSWERS| GRADED A
Alcoholic euphoria results from
A. increased activity of the cerebrum.
B. increased activity of thalamic areas.
C. increased activity of limbic synapses.
D. decreased activity of medullary centers.
E. removal of the inhibitory effect of the cortex. Correct Answer: E. removal of
the inhibitory effect of the cortex.
The portion of an artificial tooth that is found only in porcelain anterior teeth is
A. the pin.
B. the collar.
C. the finish line.
D. the diatoric.
E. None of above Correct Answer: A. the pin.
The casting shrinkage of cobalt-chromium alloys is approximately
A. 1.25%.
B. 1.75%.
C. 2.2%.
D. 3.2%. Correct Answer: C. 2.2%.
Which of the following is a disadvantage of glass ionomer cement?
A. Difficulty in mixing
B. Irritation of the pulp
C. Low bond strength to dentin
D. Moisture sensitivity during initial set Correct Answer: D. Moisture sensitivity
during initial set
,Which of the following will result when using a thinner mix of a gypsum-bonded
casting investment?
A. Produce a smoother casting
B. Increase setting expansion
C. Decrease setting expansion
D. Increase thermal expansion
E. Decrease required burn-out temperature Correct Answer: C. Decrease setting
expansion
Which of the following oral bacteria have been implicated as periodontal
pathogens?
A. Porphyromonas gingivalis, Eubacterium sp., and Campylobacter recta
B. Streptococcus gordonii, Streptococcus mutans, and Gemella sp.
C. Lactobacillus casei and Veillonella sp.
D.. Streptococcus mitior, Streptococcus gordonii, and Bacteroides gracilis Correct
Answer: A. Porphyromonas gingivalis, Eubacterium sp., and Campylobacter recta
The base of the incision in the gingivectomy technique is located
A. in the alveolar mucosa.
B. at the mucogingival junction.
C. above the mucogingival junction.
D. coronal to the periodontal pocket.
E. at the level of the cementoenamel junction. Correct Answer: C. above the
mucogingival junction.
Which of the following is the most important factor affecting pulpal response?
A. Heat
B. Depth to which dentinal tubules are cut
C. Desiccation
D. Invasion of bacteria Correct Answer: B. Depth to which dentinal tubules are
cut
, Primary herpetic gingivostomatitis is most likely to occur in which of the following
age groups?
A. 1-5 years
B. 6-10 years
C. 11-15 years
D. 16-20 years
E. 21-25 years Correct Answer: A. 1-5 years
Which of the following filling materials is least desirable for use as Preventive
Resin Restoration?
A. Microfilled resin
B. Amalgam
C. Hybrid resin
D. Glass ionomer Correct Answer: B. Amalgam
Each of the following osseous defects would be classified as infrabony EXCEPT
one. Which one is the EXCEPTION?
A. A trough
B. A dehiscence
C. A hemiseptum
D. An interdental crater Correct Answer: B. A dehiscence
Allowing the ultrasonic-scaler tip to remain on the tooth surface too long will
A. damage the tooth surface.
B. dull the tip of the instrument.
C. burnish the calculus onto the
D. tooth surface.
E. cause irreversible pulpal damage. Correct Answer: A. damage the tooth
surface.
The most important anticoagulant effect of heparin is to interfere with the
conversion of
AND ANSWERS| GRADED A
Alcoholic euphoria results from
A. increased activity of the cerebrum.
B. increased activity of thalamic areas.
C. increased activity of limbic synapses.
D. decreased activity of medullary centers.
E. removal of the inhibitory effect of the cortex. Correct Answer: E. removal of
the inhibitory effect of the cortex.
The portion of an artificial tooth that is found only in porcelain anterior teeth is
A. the pin.
B. the collar.
C. the finish line.
D. the diatoric.
E. None of above Correct Answer: A. the pin.
The casting shrinkage of cobalt-chromium alloys is approximately
A. 1.25%.
B. 1.75%.
C. 2.2%.
D. 3.2%. Correct Answer: C. 2.2%.
Which of the following is a disadvantage of glass ionomer cement?
A. Difficulty in mixing
B. Irritation of the pulp
C. Low bond strength to dentin
D. Moisture sensitivity during initial set Correct Answer: D. Moisture sensitivity
during initial set
,Which of the following will result when using a thinner mix of a gypsum-bonded
casting investment?
A. Produce a smoother casting
B. Increase setting expansion
C. Decrease setting expansion
D. Increase thermal expansion
E. Decrease required burn-out temperature Correct Answer: C. Decrease setting
expansion
Which of the following oral bacteria have been implicated as periodontal
pathogens?
A. Porphyromonas gingivalis, Eubacterium sp., and Campylobacter recta
B. Streptococcus gordonii, Streptococcus mutans, and Gemella sp.
C. Lactobacillus casei and Veillonella sp.
D.. Streptococcus mitior, Streptococcus gordonii, and Bacteroides gracilis Correct
Answer: A. Porphyromonas gingivalis, Eubacterium sp., and Campylobacter recta
The base of the incision in the gingivectomy technique is located
A. in the alveolar mucosa.
B. at the mucogingival junction.
C. above the mucogingival junction.
D. coronal to the periodontal pocket.
E. at the level of the cementoenamel junction. Correct Answer: C. above the
mucogingival junction.
Which of the following is the most important factor affecting pulpal response?
A. Heat
B. Depth to which dentinal tubules are cut
C. Desiccation
D. Invasion of bacteria Correct Answer: B. Depth to which dentinal tubules are
cut
, Primary herpetic gingivostomatitis is most likely to occur in which of the following
age groups?
A. 1-5 years
B. 6-10 years
C. 11-15 years
D. 16-20 years
E. 21-25 years Correct Answer: A. 1-5 years
Which of the following filling materials is least desirable for use as Preventive
Resin Restoration?
A. Microfilled resin
B. Amalgam
C. Hybrid resin
D. Glass ionomer Correct Answer: B. Amalgam
Each of the following osseous defects would be classified as infrabony EXCEPT
one. Which one is the EXCEPTION?
A. A trough
B. A dehiscence
C. A hemiseptum
D. An interdental crater Correct Answer: B. A dehiscence
Allowing the ultrasonic-scaler tip to remain on the tooth surface too long will
A. damage the tooth surface.
B. dull the tip of the instrument.
C. burnish the calculus onto the
D. tooth surface.
E. cause irreversible pulpal damage. Correct Answer: A. damage the tooth
surface.
The most important anticoagulant effect of heparin is to interfere with the
conversion of
