ENDO OSCE LATEST 2026 EXAM QUESTIONS AND
SOLUTIONS GRADED A+
✔✔All of the following describe pulpal extirpation EXCEPT:
A. Pulp extirpation is defined as "extracting the root" from the canal
B. Extirpation is best accomplished with broach
C. Extirpation in a narrow and tortuous canal requires use of files
D. Extirpation is reserved for teeth with vital pulps only
E. Extirpation precedes cleaning and shaping of the canal - ✔✔A. Pulp extirpation is
defined as "extracting the root" from the canal
✔✔Apical periodontitis following overinstrumentation can be best treated by
A. Reducing occlusion
B. Prescribing corticosteroid anti-inflammatory medications
C. Prescribing strong analgesics
D. Prescribing antibiotics
E. All of the above - ✔✔E. All of the above
✔✔In which condition would a single rooted tooth be expected to respond to heat, cold,
EPT
A. Apical cyst
B. Apical acute abscess
C. Chronic apical periodontitis
D. Suppurative apical periodontitis
E. Periapical cemento-osseous dysplasia - ✔✔E. Periapical cemento-osseous dysplasia
✔✔Which is LEAST likely to discolor a mature tooth with necrotic pulp
A. Decomposing necrotic tissue
B. Hemolysis of unresolved blood cells
C. Failure to include pulp horns in the coronal access
D. Frequent ingestion of heavy doses of tetracycline
E. Use of root canal sealer that contains liver - ✔✔D. Frequent ingestion of heavy doses
of tetracycline
✔✔The observation on the periapical film of a root canal space that fades abruptly as
midroot is indicative of:
A. A heavily calcified root canal
B. Idiopathic calcification metamorphosis
C. Bifurcated canals
D. A radiographic artifact
E. A necrotic pulp - ✔✔C. Bifurcated canals
✔✔The significance of observing a double ligament line on the periapical radiograph is
A. Warns of invagination of the root
B. The possibility of an additional root canal
, C. Consideration of anti-curvature filling in curved canals
D. The possibility of multiple roots
E. All of the above - ✔✔E. All of the above
✔✔In the pulp, bradykinin release, histamine release, increased interstitial tissue
pressure and fluid accumulation are inflammatory reactions with produce:
A. Necrosis
B. Infection
C. Pain
D. Redness
E. Hemorrhage - ✔✔C. Pain
✔✔Endodontic exposure to acid released by bacteria inside an incipient carious lesion
can have the following effects on the pulp EXCEPT:
A. Formation of irritation dentin
B. Increase in dead tracts
C. Excruciating toothache pain
D. Decrease in pulp volume - ✔✔C. Excruciating toothache pain
✔✔Which one is FALSE?
A. Even though the patient has a painful response to percussion, the pulp may be vital
B. Tenderness to apical palpation can be associated with periapical inflammation
C. Periodontal probing of a tooth requiring endodontic treatment should be done only
when the clinician suspects periodontal disease
D. Even though the patient does not have a painful response to percussion, the pulp
may be totally necrotic
E. Tenderness to palpation may be due to some type of periodontal dis - ✔✔C.
Periodontal probing of a tooth requiring endodontic treatment should be done only when
the clinician suspects periodontal disease
✔✔Your patient has a history of a large carious lesion in his mandibular right molar. He
presents with a submandibular facial swelling on the right and a fever. His condition
progressed to having purulent exudate through the gingival sulcus and right
submaxillary lymphadenopathy. What is the likely diagnosis? - ✔✔Acute osteomyelitis
✔✔Your patient has an acute pulpitis on the lower 1st molar. You decide to give a
mandibular (IA) block and a long buccaneer injection. What other injections should you
consider for profound anesthesia?
A. Subperiosteal
B. Lingual infiltration
C. Intrapulpal
D. All of the above - ✔✔D. All of the above
✔✔A patient presents to you 48 hours after pulpal extirpation with severe pain and
swelling. There are no signs of periapical pathology. What is the likely diagnosis?
SOLUTIONS GRADED A+
✔✔All of the following describe pulpal extirpation EXCEPT:
A. Pulp extirpation is defined as "extracting the root" from the canal
B. Extirpation is best accomplished with broach
C. Extirpation in a narrow and tortuous canal requires use of files
D. Extirpation is reserved for teeth with vital pulps only
E. Extirpation precedes cleaning and shaping of the canal - ✔✔A. Pulp extirpation is
defined as "extracting the root" from the canal
✔✔Apical periodontitis following overinstrumentation can be best treated by
A. Reducing occlusion
B. Prescribing corticosteroid anti-inflammatory medications
C. Prescribing strong analgesics
D. Prescribing antibiotics
E. All of the above - ✔✔E. All of the above
✔✔In which condition would a single rooted tooth be expected to respond to heat, cold,
EPT
A. Apical cyst
B. Apical acute abscess
C. Chronic apical periodontitis
D. Suppurative apical periodontitis
E. Periapical cemento-osseous dysplasia - ✔✔E. Periapical cemento-osseous dysplasia
✔✔Which is LEAST likely to discolor a mature tooth with necrotic pulp
A. Decomposing necrotic tissue
B. Hemolysis of unresolved blood cells
C. Failure to include pulp horns in the coronal access
D. Frequent ingestion of heavy doses of tetracycline
E. Use of root canal sealer that contains liver - ✔✔D. Frequent ingestion of heavy doses
of tetracycline
✔✔The observation on the periapical film of a root canal space that fades abruptly as
midroot is indicative of:
A. A heavily calcified root canal
B. Idiopathic calcification metamorphosis
C. Bifurcated canals
D. A radiographic artifact
E. A necrotic pulp - ✔✔C. Bifurcated canals
✔✔The significance of observing a double ligament line on the periapical radiograph is
A. Warns of invagination of the root
B. The possibility of an additional root canal
, C. Consideration of anti-curvature filling in curved canals
D. The possibility of multiple roots
E. All of the above - ✔✔E. All of the above
✔✔In the pulp, bradykinin release, histamine release, increased interstitial tissue
pressure and fluid accumulation are inflammatory reactions with produce:
A. Necrosis
B. Infection
C. Pain
D. Redness
E. Hemorrhage - ✔✔C. Pain
✔✔Endodontic exposure to acid released by bacteria inside an incipient carious lesion
can have the following effects on the pulp EXCEPT:
A. Formation of irritation dentin
B. Increase in dead tracts
C. Excruciating toothache pain
D. Decrease in pulp volume - ✔✔C. Excruciating toothache pain
✔✔Which one is FALSE?
A. Even though the patient has a painful response to percussion, the pulp may be vital
B. Tenderness to apical palpation can be associated with periapical inflammation
C. Periodontal probing of a tooth requiring endodontic treatment should be done only
when the clinician suspects periodontal disease
D. Even though the patient does not have a painful response to percussion, the pulp
may be totally necrotic
E. Tenderness to palpation may be due to some type of periodontal dis - ✔✔C.
Periodontal probing of a tooth requiring endodontic treatment should be done only when
the clinician suspects periodontal disease
✔✔Your patient has a history of a large carious lesion in his mandibular right molar. He
presents with a submandibular facial swelling on the right and a fever. His condition
progressed to having purulent exudate through the gingival sulcus and right
submaxillary lymphadenopathy. What is the likely diagnosis? - ✔✔Acute osteomyelitis
✔✔Your patient has an acute pulpitis on the lower 1st molar. You decide to give a
mandibular (IA) block and a long buccaneer injection. What other injections should you
consider for profound anesthesia?
A. Subperiosteal
B. Lingual infiltration
C. Intrapulpal
D. All of the above - ✔✔D. All of the above
✔✔A patient presents to you 48 hours after pulpal extirpation with severe pain and
swelling. There are no signs of periapical pathology. What is the likely diagnosis?
