MOSBY Flashcards
Which of the following tests is the least useful in endodontic diagnosis of children?
A. Percussion
B. Palpation
C. Electric pulp test
D. Cold test
C. Electric pulp test
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
D. Mandibular molar
NOTES:
Max CI, LI: Forehead region
Max C, PM1: Nasolabial area
Max PM2: Temporal region
Max M: Zygomatic, parietal, and occipital regions of head
Mand M: Ear, angle of jaw, or posterior regions of neck
Mandibular CI, LI, C, PM: Mental region of mandible
Max and Mand M: Opposing quadrant or to other teeth in the same quadrant
Which of the following diagnostic criteria is least reliable in the assessment of the pulpal status of the primary dentition?
A. Swelling
B. Electric pulp test
C. Spontaneous pain
D. Internal resorption
B. Electric pulp test
Which of the following can be viewed on a conventional radiograph?
A. Buccal curvature of roots
B. Gingival fibers
C. Calcification of canals
D. Periodontal ligament
C. Calcification of canals
Which of the following 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. Radiographic exam is the best way to detect it.
D. A and C only.
E. B and C only.
A. The direction of the crack usually extends mesiodistally.
Which is the most likely to cause pulp necrosis?
A. Subluxation
B. Extrusion
C. Avulsion
D. Concussion
C. Avulsion
NOTES:
Subluxation: The tooth is LOOSENED but not displaced
Extrusion: The tooth is PARTIALLY extruded from its socket.
Avulsion: The tooth is COMPLETELY extruded from its socket.
Concussion: NO DISPLACEMENT, normal mobility, sensitive to percussion.
Which of the following statement(s) is(are) true regarding treatment of a tooth presenting with a sinus tract?
A. Treat with conventional root canal therapy.
B. Antibiotics are not needed.
C. The sinus tract should heal in 2 to 4 weeks after conventional root canal therapy.
D. If the tract persists post-root canal therapy, do root-end surgery with root-end filling.
E. All of the above choices are true.
E. All of the above choices are true.
NOTES:
Antibiotics are not needed, since the infection is localized and draining. If the tract does not heal within a few weeks, root-end surgery may be required.
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. NOTA
B. A history of recent restoration of the tooth in question.
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.
B. They are eliminated by the natural defenses of the body.
The major objectives of access preparation include all of the following except which one?
A. The attainment of direct, straight-line access to canal orifices.
B. The confirmation of clinical diagnosis.
C. The conservation of tooth structure.
D. The attainment of direct, straight-line access to the apical portion of the root.
B. The confirmation of clinical diagnosis.❌
Which of the following best describes the anesthetic effects of a posterior superior alveolar nerve block?
A. Pulpal anesthesia of the maxillary second and third molars.
B. Pulpal anesthesia of the maxillary first molar.
C. Pulpal anesthesia of the maxillary first and second premolars.
D. Pulpal anesthesia of the second premolar.
A. Pulpal anesthesia of the maxillary second and third molars.
Which one of the following cannot be observed on a conventional radiograph?
A. Canal calcification of tooth #15.
B. Buccal curvature of the mesial root of tooth #30.
C. Type of canals of tooth #21.
D. Open apex of tooth #8.
B. Buccal curvature of the mesial root of tooth #30.❌
The indications for periradicular surgery include all of the following except which one?
A. Procedural accidents during previous nonsurgical endodontic treatment.
B. Irretrievable separated files in the canals.
C. Failed nonsurgical endodontic treatment and persisting radiolucency.
D. Treatment for a nonrestorable tooth.
D. Treatment for a nonrestorable tooth.❌
Which of the following teeth has the most consistent number of canal(s)?
A. Mandibular incisor
B. Mandibular canine
C. Maxillary canine
D. Mandibular premolar
C. Maxillary canine
Which is not a property of sodium hypochlorite (NaOCl)?
A. Chelation
B. Tissue dissolution at higher concentrations
C. Microbicidal activity
D. Flotation of debris and lubrication
A. Chelation.❌
Initial instrumentation in endodontic treatment is done to the level of the _____.
A. Radiographic apex
B. Dentinoenamel junction
C. Cementodentinal junction
D. Cementopulpal junction
C. Cementodentinal junction.
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 with larger files to remove the ledge.
A. Use a smaller instrument and get by the ledge.
Which perforation location has the best prognosis?
A. Coronal third of root
B. Apical third of root
C. Chamber floor
D. Middle third of root
B. Apical third of root.
NOTES:
In general, the more subcrestally located the lesion, the better the prognosis.
Which of the following statements best describes treatment options for a separated instrument at the initial stage of cleaning and shaping?
A. Immediate attempt to remove the instrument.
B. Stop canal instrumentation, do not attempt removal, and obturate.
C. Attempt to bypass the obstructed instrument.
D. Both A and C are options.
D. Both A and C are options.
NOTES:
Initial stage/ Cleaning and Shaping:
- attempt to remove the instrument
- attempt to bypass it
- prepare and obturate to the segment
Filling Stage
- Do not attempt removal and proceed to obturate
Which of the following is the most significant cause of ledge formation?
A. Infection
B. Remaining debris within the canal
C. No straight-line access
C. No straight-line access.
A classic teardrop-shaped periradicular lesion on a radiograph can be indicative of a vertical root fracture.
The prognosis of a vertical root fracture is hopeless, and the tooth should be extracted.
A. First statement is true, second is false.
B. First statement is false, second is true.
C. Both statements are true.
D. Both statements are false.
C. Both statements are true.
NOTES:
Vertical root fracture: teardrop- shaped, J-shaped, or halolike radiolucency.
The 02 taper on hand K-files is ___.
A. 0.2-mm increase in diameter per 1-mm increase in length
B. 0.02-mm increase in diameter per 1-mm increase in length
C. 0.2-mm increase in diameter per 2-mm increase in length
D. 0.02-mm increase in diameter per 2-mm increase in length
B. 0.02-mm increase in diameter per 1-mm
increase in length.
How should a vital second permanent molar with a 2.0-mm exposure on a 12-year-old patient be treated?
A. Apexification
B. Direct pulp capping
C. Indirect pulp capping
D. Extract
E. Apexogenesis
A. Apexification.
NOTES:
Apexification: >2mm
Apexogenesis: <2mm
At what stage is endodontic treatment considered complete?
A. When a temporary restoration is placed and the rubber dam removed.
B. When canals are seared off and plugged.
C. When the coronal restoration is completed.
D. When the patient is asymptomatic
C. When the coronal restoration is completed.