NBDE Part II UPDATED ACTUAL Exam
Questions and CORRECT Answers
Which of the following best explains why the renal excretion of salicylic acid is increased in an
alkaline urine?
A. The urine volume is decreased.
B. The percentage of salicylic acid that is ionized in urine is increased.
C. The percentage of salicylic acid that is ionized in urine is decreased.
D. Decreasing urine pH usually increases the renal excretion of weak acids. - CORRECT
ANSWER - B. The percentage of salicylic acid that is ionized in urine is increased.
X-rays are produced when
A. Protons strike the anode.
B. Electrons strike the anode.
C. The anode is heated above 3,000 degrees Centigrade.
D. The filament becomes positively charged. - CORRECT ANSWER - B. Electrons strike
the anode.
Primary crown mineralization (calcification) generally begins
A. In the third to sixth week in utero.
B. In the second trimester.
C. In the third trimester.
D. At birth. - CORRECT ANSWER - B. In the second trimester.
Which of the following best describes the usual behavioral characteristics of a child who has
Down syndrome?
,A. Crying and stubborn
B. Hyperactive and disoriented
C. Smiling, affectionate, and easily distracted
D. Fearful and unresponsive to verbal communication - CORRECT ANSWER - C.
Smiling, affectionate, and easily distracted
A member of the dental staff routinely fails to clean up his work area. Which of the following
best exemplifies an assertive message that could be made by a co-worker?
A. If you refuse to do your part, I'm just going to have to report the situation to the boss.
B. When you don't help with the clean-up, it makes me angry because I have to do both your
work and my own.
C. I'm tired of cleaning up your mess!
D. I hope you'll remember to help me clean up today.
E. Is something bothering you? You sometimes forget to clean up. - CORRECT
ANSWER - B. When you don't help with the clean-up, it makes me angry because I have
to do both your work and my own.
The crown of an endodontically-treated maxillary lateral incisor is fractured near the gingival
margin. The coronal end of the silver cone used in filling that canal is visible at that level. The
findings reveal that the existing root canal filling meets all criteria to be judged successful.
Which of the following is the best way to obtain the needed post space?
A. To prepare it alongside the silver cone using burs and Peeso reamers.
B. To carefully grind away the coronal part of the silver cone using round burs or end-cutting
burs.
C. To remove the silver cone and re-treat the canal using a gutta-percha technique, and then to
create the needed post space.
D. To remove the silver cone, notch it 4 mm from the apical end, coat it with freshly mixed
sealer, replace it in the canal, and "twist-off" the coronal segment. - CORRECT
, ANSWER - C. To remove the silver cone and re-treat the canal using a gutta-percha
technique, and then to create the needed post space.
After receiving one cartridge of a local anesthetic, a healthy adult patient became unconscious in
the dental chair. The occurrence of a brief convulsion is
A. Pathognomonic of grand mal epilepsy.
B. Consistent with a diagnosis of syncope.
C. Usually caused by the epinephrine in the local anesthetic.
D. Pathognomonic of intravascular injection of a local anesthetic. - CORRECT
ANSWER - B. Consistent with a diagnosis of syncope.
The axial wall of an occlusolingual amalgam preparation on a maxillary molar should be in
dentin and
A. Parallel to the dentinoenamel junction.
B. Parallel to the long axis of the tooth.
C. At an acute angle with the pulpal floor. - CORRECT ANSWER - A. Parallel to the
dentinoenamel junction.
During the mixed dentition stage, which of the following appliances should be used as a space
maintainer for missing primary molars in the mandibular arch?
A. Distal shoe
B. Nance holding arch
C. Passive lingual arch
D. Removable acrylic functional - CORRECT ANSWER - C. Passive lingual arch
Accepted methods for closing a diastema between maxillary central incisors include using either
a removable appliance with finger springs or
Questions and CORRECT Answers
Which of the following best explains why the renal excretion of salicylic acid is increased in an
alkaline urine?
A. The urine volume is decreased.
B. The percentage of salicylic acid that is ionized in urine is increased.
C. The percentage of salicylic acid that is ionized in urine is decreased.
D. Decreasing urine pH usually increases the renal excretion of weak acids. - CORRECT
ANSWER - B. The percentage of salicylic acid that is ionized in urine is increased.
X-rays are produced when
A. Protons strike the anode.
B. Electrons strike the anode.
C. The anode is heated above 3,000 degrees Centigrade.
D. The filament becomes positively charged. - CORRECT ANSWER - B. Electrons strike
the anode.
Primary crown mineralization (calcification) generally begins
A. In the third to sixth week in utero.
B. In the second trimester.
C. In the third trimester.
D. At birth. - CORRECT ANSWER - B. In the second trimester.
Which of the following best describes the usual behavioral characteristics of a child who has
Down syndrome?
,A. Crying and stubborn
B. Hyperactive and disoriented
C. Smiling, affectionate, and easily distracted
D. Fearful and unresponsive to verbal communication - CORRECT ANSWER - C.
Smiling, affectionate, and easily distracted
A member of the dental staff routinely fails to clean up his work area. Which of the following
best exemplifies an assertive message that could be made by a co-worker?
A. If you refuse to do your part, I'm just going to have to report the situation to the boss.
B. When you don't help with the clean-up, it makes me angry because I have to do both your
work and my own.
C. I'm tired of cleaning up your mess!
D. I hope you'll remember to help me clean up today.
E. Is something bothering you? You sometimes forget to clean up. - CORRECT
ANSWER - B. When you don't help with the clean-up, it makes me angry because I have
to do both your work and my own.
The crown of an endodontically-treated maxillary lateral incisor is fractured near the gingival
margin. The coronal end of the silver cone used in filling that canal is visible at that level. The
findings reveal that the existing root canal filling meets all criteria to be judged successful.
Which of the following is the best way to obtain the needed post space?
A. To prepare it alongside the silver cone using burs and Peeso reamers.
B. To carefully grind away the coronal part of the silver cone using round burs or end-cutting
burs.
C. To remove the silver cone and re-treat the canal using a gutta-percha technique, and then to
create the needed post space.
D. To remove the silver cone, notch it 4 mm from the apical end, coat it with freshly mixed
sealer, replace it in the canal, and "twist-off" the coronal segment. - CORRECT
, ANSWER - C. To remove the silver cone and re-treat the canal using a gutta-percha
technique, and then to create the needed post space.
After receiving one cartridge of a local anesthetic, a healthy adult patient became unconscious in
the dental chair. The occurrence of a brief convulsion is
A. Pathognomonic of grand mal epilepsy.
B. Consistent with a diagnosis of syncope.
C. Usually caused by the epinephrine in the local anesthetic.
D. Pathognomonic of intravascular injection of a local anesthetic. - CORRECT
ANSWER - B. Consistent with a diagnosis of syncope.
The axial wall of an occlusolingual amalgam preparation on a maxillary molar should be in
dentin and
A. Parallel to the dentinoenamel junction.
B. Parallel to the long axis of the tooth.
C. At an acute angle with the pulpal floor. - CORRECT ANSWER - A. Parallel to the
dentinoenamel junction.
During the mixed dentition stage, which of the following appliances should be used as a space
maintainer for missing primary molars in the mandibular arch?
A. Distal shoe
B. Nance holding arch
C. Passive lingual arch
D. Removable acrylic functional - CORRECT ANSWER - C. Passive lingual arch
Accepted methods for closing a diastema between maxillary central incisors include using either
a removable appliance with finger springs or
