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NBDE II > ENDO Sample Questions > Flashcards

ENDO Sample Questions Flashcards

1
Q

an 8-year old girl presents to the office with an ellis class II fracture. in an effort to determine a pulpal diagnosis, which of the following tests is LEAST accurate?

a. percussion
b. palpation
c. electric pulp test
d. cold test

A

C

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2
Q

symptomatic irreversible pulpitis pain in which of the following sites is MOST likely to radiate to the ear?

a. maxillary premolar
b. maxillary molar
c. mandibular premolar
d. mandibular molar

A

D

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3
Q

which of the following statements regarding external root resorption is NOT true?

a. it is a destructive process initiated in the periodontium
b. there are three main types: inflammatory root resorption, replacement resorption, and cervical resorption
c. it can be located anywhere along the root canal
d. the margins are sharp, smooth, and well defined

A

D

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4
Q

which of the following statements MOST likely applies to a cracked tooth?

a. the direction of the crack usually extends mesiodistally
b. the direction of the crack usually extends faciolingually
c. choices A and C only
d. choices B and C only

A

A

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5
Q

which of the following statements regarding treatment of a tooth manifesting with a sinus tract is TRUE?

a. treat with conventional (nonsurgical) endodontic therapy
b. antibiotics are not needed
c. the sinus tract should heal in 2-4 weeks after conventional root canal therapy
d. if the sinus tract persists after RCT, perform root end surgery with root end filling
e. all of the above

A

E

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6
Q

the major objectives of access preparation include all of the following EXCEPT one. which one is the EXCEPTION?

a. attainment of direct straight-line access to canal orifices
b. confirmation of clinical diagnosis
c. conservation of tooth structure
d. attainment of direction straight-line access to the apical root

A

B

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7
Q

which of the following is NOT a property of NaOCl?

a. chelation
b. tissue dissolution at higher concentrations
c. microbicidal activity
d. flotation of debris and lubrication

A

A

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8
Q

while performing nonsurgical endodontic therapy, you detect a ledge. what should you do?

a. use a smaller instrument and get by the ledge
b. fill as far as you have reamed
c. use a small round bur and remove the ledge
d. continue working gently to remove the ledge

A

A

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9
Q

which perforation location has the BEST prognosis?

a. coronal third of root
b. apical third of rood
c. chamber floor
d. middle third of root

A

B

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10
Q

a classic teardrop-shaped apical lesion on a radiograph can indicate a vertical root fracture. the prognosis of a vertical root fracture is hopeless, and the tooth should be extracted.

a. the first statement is true and the second statement is false
b. the first statement is false and the second statement is true
c. both statements are true
d. both statements are false

A

C

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11
Q

a patient presents with a CC of swelling in the mandibular left quadrant that started 2 days ago and developed quickly. the pt has a mild fever with malaise, and clinical examination revealed localized fluctuant swelling in the buccal vestibule of teeth #18 and #19. tooth #19 is nonresponsive to thermal testing and exhibits moderate pain to percussion. radiographic findings reveal a slight widened PDL space. based on these findings, the MOST likely apical diagnosis is ___.

a. acute apical abscess
b. irreversible necrotic apical periodontitis
c. asymptomatic irreversible pulpitis
d. symptomatic apical periodontitis

A

A

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12
Q

prolonged, unprovoked night pain suggests which of the following conditions of the pulp?

a. pulpal necrosis
b. mild hyperemia
c. reversible pulpitis
d. periodontal abscess

A

A

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13
Q

the pathognomonic symptom of symptomatic apical periodontitis is ___.

a. swelling
b. intermittent pain
c. tenderness to palpation
d. tenderness to percussion

A

D

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14
Q

in differentiating between an endodontic abscess and periodontal abscess, first test ___.

a. pulp vitality
b. probing depths
c. percussion sensitivity
d. degree of mobility

A

A

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15
Q

which of the following statements is NOT consistent with cracked tooth syndrome?

a. symptoms are often variable because of direction, location, and extent of the crack
b. teeth with cracks may have erratic pain on mastication
c. pain is associated with release of pressure rather than increased biting force
d. pain, especially in response to cold, is a telltale sign
e. absence of pain rules out the presence of a crack

A

E

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16
Q

in a tooth with a primary periodontal lesion with secondary endodontic involvement, proceed first with ___.

a. periodontal treatment
b. nonsurgical endodontic treatment
c. antibiotic treatment
d. incision and drainage

A

B

17
Q

a patient calls late saturday night because of a severe, throbbing pain in a mandibular premolar aggravated by “heat, biting, and touching.” what procedure is recommended?

a. instruct the pt to apply ice intermittently, take aspirin, and call monday for an appointment
b. see the patient at the office and initiate endodontic treatment
c. see the pt at the office, remove the carious dentin, and place a sedative zinc oxide-eugenol cement temporary restoration
d. prescribe an analgesic and refer the pt to an endodontist
e. refer the pt to the hospital oral surgery department for extraction

A

B

18
Q

in an emergency patient, symptomatic irreversible pulpitis and symptomatic apical periodontitis of tooth #12 is diagnosed. which of the following is the BEST treatment protocol for this patient?

a. anesthesia followed by incision and drainage
b. anesthesia followed by extraction
c. anesthesia followed by pulpectomy
d. prescribe antibiotic for 1 week and follow with nonsurgical endodontic treatment

A

C

19
Q

in which of the following conditions is elective root canal therapy contraindicated?

a. AIDS
b. recent MI
c. leukemia
d. radiotherapy
e. second trimester pregnancy

A

B

20
Q

what is the best timing for performing incision and drainage at an area of infection?

a. when the swelling is hard and diffuse
b. when the area is the most painful
c. when the area is large
d. when the swelling is localized and fluctuant

A

D

21
Q

endodontic infection usually is polymicrobial. what is the predominate type of microorganism found in a tooth that requires endodontic therapy?

a. aerobic bacteria
b. facultative bacteria
c. obligate anaerobic bacteria
d. yeast microorganisms

A

C

22
Q

the “danger zone” of mandibular molar for perforations during canal instrumentation is ___.

a. the periphery at the level of the dentinocemental junction
b. within 2mm of the apex
c. the furcation area
d. the periphery of the access at the level of the cementoenamel junction

A

C

23
Q

what is the treatment of choice for an 8-year old pt who has a 1mm intrusion injury of tooth #8?

a. extract the tooth
b. perform pulpotomy immediately
c. splint the tooth for 10-14 days immediately
d. allow the tooth to reerupt

A

D

24
Q

on routine radiographic survey of a new pt, you notice a circle-shaped radiolucency midroot and over the pulpal outline of tooth #6. you take a second mesially angulated radiograph and confirm the radiolucency is part of the pulp canal outline. after a vital response to cold testing, your diagnosis and subsequent treatment plan are ___.

a. internal resorption and completion of nonsurgical endodontic treatment
b. internal resorption and surgical repair of the defect
c. external root resorption and forced orthodontic eruption to expose the defect
d. external root resorption and extraction

A

A

25
Q

during a nonvital bleaching procedure, if a barrier material is not placed between the root canal filling and bleaching material, the tooth can be subjected to ___.

a. external cervical resorption
b. demineralization of tooth structure
c. gingival inflammation
d. poor color improvement

A

A

26
Q

a healthy 32-year old man presents with localized fluctuant swelling associated with a necrotic pulp and an apical diagnosis of acute apical abscess for tooth #5. the principal modality or modalities for treating a localized fluctuant swelling include which of the following?

a. administration of antibiotics
b. achievement of drainage
c. removal of the source of infection
d. both A and C
e. both B and C

A

E

27
Q

which of the following statements MOST accurately describes the manufacturing process for a k-type hand instrument?

a. grinding a stainless steel wire to a tapered square or rhomboid cross section
b. twisting a square or rhomboid (cross section) nontapered silver metal blank
c. grinding a silver metal blank to a nontapered square or rhomboid cross section
d. both B and C
e. all of the above

A

A

28
Q

benefits of intracanal irrigation include all of the following EXCEPT one. which one is the EXCEPTION?

a. dissolve organic debris
b. disinfects complex anatomy that is not accessible by instrumentation
c. removes the smear layer
d. facilitates obturation

A

D

29
Q

the bacterial flora of an infected previously treated endodontic tooth is best characerized as:

a. gram negative strict anaerobes
b. gram positive facultative anaerobes
c. gram negative facultative aerobes
d. gram positive strict aerobes

A

B

30
Q

because of its mesial concavity, the following tooth is vulnerable to iatrogenic perforation:

a. mandibular first premolar
b. mandibular second premolar
c. maxillary first premolar
d. maxillary second premolar

A

C

31
Q

which of the following is NOT an accepted treatment protocol for a NaOCl accident?

a. instructions to minimize swelling with the use of cold compresses within the first 24 hours
b. irrigation with hydrogen peroxide
c. analgesics for pain control
d. antibiotics for patients at increased risk of secondary infection

A

B

32
Q

ethylenediaminetetraacetic acid or EDTA is best characterized as a ___ with a primary mode of action best described as ___.

a. chelating agent; removing the inorganic portion of the smear layer
b. emulsifying agent; removing the organic portion of the smear layer
c. chelating agent; removing the organic portion of the smear layer
d. emulsifying agent; removing the inorganic portion of the smear layer

A

A

33
Q

of the following clinical diagnostic tests, which is the MOST accurate in determining the state of pulpal health?

a. electric pulp test
b. heat test
c. cold test
d. both b and c

A

D

34
Q

what constitutes the largest portion of gutta percha obturation material?

a. gutta percha
b. zinc oxide
c. waxes and resins
d. heavy metal salts

A

B

35
Q

which is the most likely to cause pulp necrosis?

a. subluxation
b. extrusion
c. avulsion
d. concussion

A

C

36
Q

which of the following statement(s) is(are) true regarding treatment of a tooth presenting with a sinus tract?

a. treat with conventional root therapy
b. antibiotics are not needed
c. the sinus tract should heal in 2-4 weeks after conventional root canal therapy
d. if the tract persists post-RCT, do root end surgery with root end filling
e. all of the above choices are true

A

E

37
Q

features of focal sclerosing osteomyelitis often include:

a. a nonvital pulp test
b. a history of recent restoration of the tooth in question
c. a radiolucent lesion which, in time, becomes radiopaque
d. none of the choices are true

A

B

38
Q

once the root canal is obturated, what usually happens to the organism that had previously entered periradicular tissues from the canal?

a. they persist and stimulate formulation of a granuloma
b. they are eliminated by the natural defenses of the body
c. they reenter and reinfect the sterile canal unless root end surgery is performed
d. they will have been eliminated by various medicaments that were used in the root canal

A

B

NBDE II (35 decks)

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