As a dental amalgam restoration ages in the oral cavity, microleakage decreases because of?
A)fluoride release
B)galvanic currents
C)increase in surface flow
D)increase in edge strength
E)formation of corrosion product Correct Answer: E)formation of corrosion product
A fall in blood pressure could occur when a patient is experiencing each of the following
conditions EXCEPT one. Which one is the EXCEPTION?
A)shock
B)syncope
C)anxiety
D)allergic reaction
E)Addison’s disease Correct Answer: C)anxiety
Which of the following cells is most active in antibody production?
A)monocyte
B)mast cell
C)lymphocyte
D)plasma cell
E)polymorphonuclear leukocyte Correct Answer: D)plasma cell
Which of the following defects in restorations could be recontoured?
A)flash
B)fracture
C)open margin
D)undercontoured restoration
E)deficient proximal contact Correct Answer: A)flash
The etiology of myxedema is? Correct Answer: hyposecretion of the thyroid
Each of the following describes generalized tetracycline stain EXCEPT one. Which one is the
EXCEPTION?
A)initiated in adolescence
B)acquired in early childhood
C)considered intrinsic endogenous
D)acquired through fetal circulation
E)can be shades of green, yellow, and gray Correct Answer: A)initiated in adolescence
Each of the following describes the appearance of cervical burnout EXCEPT one. Which one is
the EXCEPTION?
A)Demonstrates lateral root edge
B)radiolucent on dental radiographs
C)has distinct rounded inner border
D)often confused with a root caries lesion
E)phenomenon of x-ray penetration of the cementoenamel junction Correct Answer: C)has
distinct rounded inner border
What type of immunity is conferred by administration of the hepatitis B vaccination?
A)innate
B)natural active
C)natural passive
D)artificially acquired active
E)artificially acquired passive Correct Answer: D)artificially acquired active
Each of the following can appear as a white-surface lesion of the oral mucosa EXCEPT one.
Which one is the EXCEPTION?
A)mucocele
B)lichen planus
C)chemical burn
D)solar chelitis
E)geographic tongue Correct Answer: A)mucocele
Which of the following alterations is associated with progression from a healthy gingival sulcus
to gingivitis?
A)appearance of staphylococci in the sulcus
B)predominance of yeasts in subgingival plaque
C)increase in demonstrable gram negative anaerobic rods in plaque
D)predominance of spirochetes in supragingival plaque
E)rapid toxin synthesis preceding crestal bone loss Correct Answer: C)increase in demonstrable
gram negative anaerobic rods in plaque
Which of the following represents the major advantage of using foam-based APF rather than gel
APF?
A)requires less frequent application
B)requires less time for application
C)penetrates deeper into the enamel surface
D)reduces risk of accidental fluoride ingestion
E)has superior enamel uptake of topical fluoride Correct Answer: D)reduces risk of accidental
fluoride ingestion