NBDE Part 2 Endo UPDATED ACTUAL Questions and
CORRECT Answers
While performing a root canal, a dentist D
separates a file 1 mm short of the apex. The
file cannot be removed by the operator.
Which of the following treatments is
indicated for managing such as occurrence
after the dentist finished the root canal
treatment?
A. Amputate the MB root.
B. Extract the tooth.
C. Perform an apicoectomy of the MB root.
D. Place the patient on recall schedule for
further evaluation.
A patient presents with severe pain and an C
acute periapical abscess on tooth #3 that
has been present for the last three days.
Along with performing an emergency
access opening to relieve the pressure,
which of the following must also be
performed during the same appointment to
help control the active infection?
A. Adjusting occlusion
B. Introducing antimicrobial medicaments
into the pulp space
C. Debriding the canal system of necrotic
tissues
D. Prescribing analgesics
,Which of the following describes the best C
treatment option for an 8-year-old patient
who fractured their maxillary central incisor
after they slipped and fell in the bathroom at
the restaurant next door and came over
afterwards? As you examine the fracture,
you notice a 3mm opening into the pulp.
A. Apicoectomy
B. Apexification
C. Apexogenesis
D. Indirect pulp cap
E. Direct pulp cap
Which of the following describes the orifice D
location of the 4th canal common to tooth
#3?
A. Distal to the palatal canal in patients from
the Pacific Islands
B. On a line on the pulpal floor from the
distobuccal orifice to the mesiobuccal
orifice
C. On a line on the pulpal floor from the
palatal orifice to the distobuccal orifice
D. Palatal to the orifice of the mesiobuccal
canal
E. Directly under the distobuccal cusp
If an endodontist has created a triangular B
access opening when performing a root
canal, they have likely opened which of the
following teeth?
A. Mandibular 2nd premolar
B. Maxillary central incisor
C. Maxillary canine
D. Mandibular canine
,A 42-year-old patient reports to your office A
after a bike accident. The patient's maxillary
central incisor is traumatized and slightly
tender to percussion. The tooth does not
appear intruded and responds normally to
pulp vitality tests. Radiographic examination
reveals a horizontal fracture on the apical
third of the root. Which of the following is
the treatment of choice?
A. Splint and reevaluation of the tooth for
pulpal vitality at later time
B. Apicoectomy to remove the fractured
apical section of the root followed by root
canal treatment
C. Apexification and subsequent root canal
therapy
D. Root canal treatment
Which of the following is the best A
management of a tooth with a periapical
radiolucency that is smaller than it was when
the root canal was performed six months
ago?
A. Recall of the patient in six months
B. Apicoectomy
C. Extraction
D. Non-surgical retreatment
E. Root amputation
Immediately after tooth trauma, which of the C
following clinical findings is least informative
for determining the prognosis of the tooth?
A. Displacement of teeth
B. Loss of tooth structure
C. Tooth vitality
D. Tooth mobility
, Trauma to a tooth can cause the pulp B
chamber to undergo calcific
metamorphosis, because trauma can induce
odontoclasts to activate.
A. Both the statement and the reason are
correct and related.
B. Both the statement and the reason are
correct but NOT related.
C. The statement is correct, but the reason is
NOT.
D. The statement is NOT correct, but the
reason is correct.
E. NEITHER the statement NOR the reason is
correct.
Which of the following has the greatest D
impact on the success of a pulpotomy
performed on a primary molar?
A. Age of the patient
B. G. V. Black classification of coronal caries
C. Absence of root resorption
D. Vitality of the tooth pulp
When instrumenting the mesial root of tooth D
#19, which of the following canal surfaces is
the most likely to become strip perforated?
A. Mesial
B. Lingual
C. Buccal
D. Distal
CORRECT Answers
While performing a root canal, a dentist D
separates a file 1 mm short of the apex. The
file cannot be removed by the operator.
Which of the following treatments is
indicated for managing such as occurrence
after the dentist finished the root canal
treatment?
A. Amputate the MB root.
B. Extract the tooth.
C. Perform an apicoectomy of the MB root.
D. Place the patient on recall schedule for
further evaluation.
A patient presents with severe pain and an C
acute periapical abscess on tooth #3 that
has been present for the last three days.
Along with performing an emergency
access opening to relieve the pressure,
which of the following must also be
performed during the same appointment to
help control the active infection?
A. Adjusting occlusion
B. Introducing antimicrobial medicaments
into the pulp space
C. Debriding the canal system of necrotic
tissues
D. Prescribing analgesics
,Which of the following describes the best C
treatment option for an 8-year-old patient
who fractured their maxillary central incisor
after they slipped and fell in the bathroom at
the restaurant next door and came over
afterwards? As you examine the fracture,
you notice a 3mm opening into the pulp.
A. Apicoectomy
B. Apexification
C. Apexogenesis
D. Indirect pulp cap
E. Direct pulp cap
Which of the following describes the orifice D
location of the 4th canal common to tooth
#3?
A. Distal to the palatal canal in patients from
the Pacific Islands
B. On a line on the pulpal floor from the
distobuccal orifice to the mesiobuccal
orifice
C. On a line on the pulpal floor from the
palatal orifice to the distobuccal orifice
D. Palatal to the orifice of the mesiobuccal
canal
E. Directly under the distobuccal cusp
If an endodontist has created a triangular B
access opening when performing a root
canal, they have likely opened which of the
following teeth?
A. Mandibular 2nd premolar
B. Maxillary central incisor
C. Maxillary canine
D. Mandibular canine
,A 42-year-old patient reports to your office A
after a bike accident. The patient's maxillary
central incisor is traumatized and slightly
tender to percussion. The tooth does not
appear intruded and responds normally to
pulp vitality tests. Radiographic examination
reveals a horizontal fracture on the apical
third of the root. Which of the following is
the treatment of choice?
A. Splint and reevaluation of the tooth for
pulpal vitality at later time
B. Apicoectomy to remove the fractured
apical section of the root followed by root
canal treatment
C. Apexification and subsequent root canal
therapy
D. Root canal treatment
Which of the following is the best A
management of a tooth with a periapical
radiolucency that is smaller than it was when
the root canal was performed six months
ago?
A. Recall of the patient in six months
B. Apicoectomy
C. Extraction
D. Non-surgical retreatment
E. Root amputation
Immediately after tooth trauma, which of the C
following clinical findings is least informative
for determining the prognosis of the tooth?
A. Displacement of teeth
B. Loss of tooth structure
C. Tooth vitality
D. Tooth mobility
, Trauma to a tooth can cause the pulp B
chamber to undergo calcific
metamorphosis, because trauma can induce
odontoclasts to activate.
A. Both the statement and the reason are
correct and related.
B. Both the statement and the reason are
correct but NOT related.
C. The statement is correct, but the reason is
NOT.
D. The statement is NOT correct, but the
reason is correct.
E. NEITHER the statement NOR the reason is
correct.
Which of the following has the greatest D
impact on the success of a pulpotomy
performed on a primary molar?
A. Age of the patient
B. G. V. Black classification of coronal caries
C. Absence of root resorption
D. Vitality of the tooth pulp
When instrumenting the mesial root of tooth D
#19, which of the following canal surfaces is
the most likely to become strip perforated?
A. Mesial
B. Lingual
C. Buccal
D. Distal
