Endo NBDE Questions 1980 UPDATED ACTUAL Questions
and CORRECT Answers
Which of the following errors in technique are seen in the C
radiograph of the mandibular premolar region? (a) The
film was placed too far into the lingual space; (b) The film
was not placed far enough into the lingual space; (c) Too
much positive vertical angulation of x-ray cone was used;
(d) Too much negative vertical angulation of x-ray cone
was used.
A. (a) and (c)
B. (a) and (d)
C. (b) and (c)
D. (b) and (d)
A patient schedules an appointment because he says he D
is having "a problem." Examination reveals a purulent
discharge distal to the first molar, which the patient states
has been present for the past week. Radiographs reveal
considerable loss of bone on the distal of this tooth. The
remainder of the mouth is periodontally sound. Pulp tests
indicate a nonvital pulp. Proper management of this case
is to
A. extract the tooth.
B. refer the patient to a periodontist.
C. complete endodontic therapy and immediately resect
the distal root.
D. complete endodontic therapy and recall the patient
for evaluation of healing.
A 10-year-old child bumped his maxillary anterior teeth in B
an accident. The teeth were slightly loosened. When
examined by his dentist several days later, the teeth were
normal. On a six-month recall examination the radiograph
was taken. Pulp testing results indicated vital responses in
all maxillary anterior teeth. Treatment of choice for the
right central incisor is
A. extraction.
B. root canal therapy.
C. calcium hydroxide pulpotomy.
D. observation for 12 months.
, A retrofilling is indicated for which of the following C
conditions?
A. Maxillary central incisor with an inadequate single
cone root canal filling (RCF) and a 9 mm. diameter
radiolucency at the apex. The crown has a simple
composite restoration.
B. Maxillary lateral incisor with a well-condensed RCF
which has caused postoperative pain and swelling for 14
days. The tooth was asymptomatic prior to root canal
filling.
C. Maxillary premolar with a post and coping restoration
with the facial RCF 4 mm. short of the apex which has a 2
x 3 mm. radiolucency. The lingual RCF is adequate and its
apex appears normal.
D. None of the above
Which of the following may be used to disinfect gutta- C
percha points?
A. Boiling
B. Autoclave
C. Chemical solutions
D. Flame sterilization
E. Dry heat sterilization
By which of the following routes can microorganisms gain E
access to the pulp?
A. Anachoresis
B. Vascular channels
C. Exposed dentinal tubules
D. Direct extension between saliva and the pulp chamber
E. All of the above
Which of the following is characteristic of sensory fibers C
of pulp?
A. They can selectively differentiate thermal stimuli.
B. They have special neuronal endings that are specific
for proprioception.
C. They are non-selective to all stimuli indicating only
pain when the threshold has been exceeded.
D. None of the above
Which of the following is the most difficult pulpal or B
periapical pathosis to diagnose? (old terminology)
A. Necrotic pulp
B. Chronic pulpitis
C. Internal resorption
D. Acute apical abscess
E. Chronic suppurative apical periodontitis
and CORRECT Answers
Which of the following errors in technique are seen in the C
radiograph of the mandibular premolar region? (a) The
film was placed too far into the lingual space; (b) The film
was not placed far enough into the lingual space; (c) Too
much positive vertical angulation of x-ray cone was used;
(d) Too much negative vertical angulation of x-ray cone
was used.
A. (a) and (c)
B. (a) and (d)
C. (b) and (c)
D. (b) and (d)
A patient schedules an appointment because he says he D
is having "a problem." Examination reveals a purulent
discharge distal to the first molar, which the patient states
has been present for the past week. Radiographs reveal
considerable loss of bone on the distal of this tooth. The
remainder of the mouth is periodontally sound. Pulp tests
indicate a nonvital pulp. Proper management of this case
is to
A. extract the tooth.
B. refer the patient to a periodontist.
C. complete endodontic therapy and immediately resect
the distal root.
D. complete endodontic therapy and recall the patient
for evaluation of healing.
A 10-year-old child bumped his maxillary anterior teeth in B
an accident. The teeth were slightly loosened. When
examined by his dentist several days later, the teeth were
normal. On a six-month recall examination the radiograph
was taken. Pulp testing results indicated vital responses in
all maxillary anterior teeth. Treatment of choice for the
right central incisor is
A. extraction.
B. root canal therapy.
C. calcium hydroxide pulpotomy.
D. observation for 12 months.
, A retrofilling is indicated for which of the following C
conditions?
A. Maxillary central incisor with an inadequate single
cone root canal filling (RCF) and a 9 mm. diameter
radiolucency at the apex. The crown has a simple
composite restoration.
B. Maxillary lateral incisor with a well-condensed RCF
which has caused postoperative pain and swelling for 14
days. The tooth was asymptomatic prior to root canal
filling.
C. Maxillary premolar with a post and coping restoration
with the facial RCF 4 mm. short of the apex which has a 2
x 3 mm. radiolucency. The lingual RCF is adequate and its
apex appears normal.
D. None of the above
Which of the following may be used to disinfect gutta- C
percha points?
A. Boiling
B. Autoclave
C. Chemical solutions
D. Flame sterilization
E. Dry heat sterilization
By which of the following routes can microorganisms gain E
access to the pulp?
A. Anachoresis
B. Vascular channels
C. Exposed dentinal tubules
D. Direct extension between saliva and the pulp chamber
E. All of the above
Which of the following is characteristic of sensory fibers C
of pulp?
A. They can selectively differentiate thermal stimuli.
B. They have special neuronal endings that are specific
for proprioception.
C. They are non-selective to all stimuli indicating only
pain when the threshold has been exceeded.
D. None of the above
Which of the following is the most difficult pulpal or B
periapical pathosis to diagnose? (old terminology)
A. Necrotic pulp
B. Chronic pulpitis
C. Internal resorption
D. Acute apical abscess
E. Chronic suppurative apical periodontitis
