NBDE Part 2 Endo Questions Exam
2025 Questions and Answers 100%
Pass
While performing a root canal, a dentist 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. - ✔✔D
A patient presents with severe pain and an 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 - ✔✔C
Which of the following describes the best treatment option for an 8-year-old patient
who fractured their maxillary central incisor after they slipped and fell in the bathroom
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,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 - ✔✔C
Which of the following describes the orifice 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 - ✔✔D
If an endodontist has created a triangular 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 - ✔✔B
A 42-year-old patient reports to your office after a bike accident. The patient's maxillary
central incisor is traumatized and slightly tender to percussion. The tooth does not
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
,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 - ✔✔A
Which of the following is the best 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 - ✔✔A
Immediately after tooth trauma, which of the following clinical findings is least
informative for determining the prognosis of the tooth?
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 3
, A. Displacement of teeth
B. Loss of tooth structure
C. Tooth vitality
D. Tooth mobility - ✔✔C
Trauma to a tooth can cause the pulp 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. - ✔✔B
Which of the following has the greatest impact on the success of a pulpotomy
performed on a primary molar?
A. Age of the patient
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 4
2025 Questions and Answers 100%
Pass
While performing a root canal, a dentist 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. - ✔✔D
A patient presents with severe pain and an 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 - ✔✔C
Which of the following describes the best treatment option for an 8-year-old patient
who fractured their maxillary central incisor after they slipped and fell in the bathroom
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 1
,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 - ✔✔C
Which of the following describes the orifice 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 - ✔✔D
If an endodontist has created a triangular 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 - ✔✔B
A 42-year-old patient reports to your office after a bike accident. The patient's maxillary
central incisor is traumatized and slightly tender to percussion. The tooth does not
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
,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 - ✔✔A
Which of the following is the best 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 - ✔✔A
Immediately after tooth trauma, which of the following clinical findings is least
informative for determining the prognosis of the tooth?
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 3
, A. Displacement of teeth
B. Loss of tooth structure
C. Tooth vitality
D. Tooth mobility - ✔✔C
Trauma to a tooth can cause the pulp 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. - ✔✔B
Which of the following has the greatest impact on the success of a pulpotomy
performed on a primary molar?
A. Age of the patient
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 4
