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Truth or dare
1
1. Following trauma, bluish-‐grey discolouration of the crown is due to:
a) external resorption b) pulpal hemorrhage c) discoloured composite restoration d) chromogenic bacteria
2. Which of the following is LEAST likely to cause pain?
a) carious pulp exposure b) chronic hyperplastic pulpitis (pulp
polyp) c) acute pulpitis d) apical periodontitis
3. A patient experiences pain and some gingival swelling in the anterior segment of the mandible. The mandibular lateral incisor has a shallow restoration, is tender to percussion and gives a positive response to the EPT. There is some mobility. The most likely diagnosis is:
a) acute apical abscess b) acute serous pulpitis c) lateral periodontal abscess d) acute suppurative pulpitis e) chronic ulcerative pulpitis
4. Which one of the following statement is true as defined in endodontics?
a) overfilling refers to the incomplete filling of the root canal system with a surplus of material extruding beyond the apical foramen
b) underfilling refers to the complete filling of the canal space, but leaving voids in the pulp chamber for possible recontamination or infection
c) overextension refers to the extrusion of filling material through an accessory canal
d) underextension refers to the vertical extent of the filling material regardless of it’s completeness of obturation
e) all of the above 5. After completion of endodontic chemomechanical debridement you can expect to have;
a) removed all tissue from the entire root canal system
b) machined the canals to a microscopically smooth channel
c) caused some temporary inflammation
d) sterilized the root canal space e) left some areas of the root canal
system incompletely cleaned A. a, b, c B. a and c C. b and d D. d only E . all of the above 6. Which of the following methods of instrument sterilization uses the lowest temperature?
a) steam autoclave b) dry heat oven c) ethylene oxide method d) glass bead sterilizer e) alcohol autoclave
7. When root canals are treated topically with antibiotics rather than with disinfectants:
a) a greater success rate results b) the same rules of mechanical
preparation and filling must be observed
c) treatment may be completed in fewer appointments
d) there is greater assurance that all microorganisms are destroyed
e) there is a danger of sensitizing patients to antibiotics
A. a, c, d B. b, d, e C. a, b, c D. b and e E. all of the above 8. The antibiotic of choice for infections of pulpal origin is:
a) penicillin V b) lincomycin c) erythromycin d) tetracycline e) metronidazole f) Augmentin
9. Endodontic therapy is CONTRAINDICATED in teeth with:
a) inadequate periodontal support b) pulp stones c) constricted root canals d) accessory canals e) curved roots
Truth or dare
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10. Periapical surgery is CONTRAINDICATED for a tooth that has a:
a) large periapical rarefaction b) fistula related to a periapical lesion c) vertical root fracture d) fracture of the root apex and a necrotic
pulp e) a post and core retained crown
11. A patient telephones you and indicates that his front tooth has been knocked out but that it is still intact. Your instructions should be:
a) put the tooth in water and come to your office at the end of the day
b) wrap the tooth in tissue and come to your office in a week’s time
c) put the tooth in alcohol and come to your office immediately
d) place the tooth under your tongue and come to your office immediately
e) place the tooth in milk and come to your office immediately
12. The placement of a retentive pin in the proximal regions of posterior teeth would most likely result in PDL perforation in the:
a) mesial of a mandibular first premolar b) distal of a mandibular first premolar c) distal of a mandibular first molar d) mesial of a mandibular first molar
13. In permanent teeth, two pulp canals are most commonly found in the:
a) distobuccal root of maxillary molars b) distal root of mandibular first molars c) palatal root of maxillary first premolars d) mesial root of mandibular first molars
14. A rubber dam should be used in:
a) pulp capping procedures b) amalgam placement c) composite placement d) removing carious dentin from deep
lesions e) all of the above
15. The air-‐water spray used as a coolant in high speed cutting of a cavity will:
a) decrease pulp damage b) reduce frictional heat c) keep the operating site clean d) reduce clogging of cutting instruments
A. a, b, c
B. a and c C. b and d D. d only E. all of the above 16. Which of the following statement is true?
a) radiographs cannot differentiate between infected and non-‐infected periapical lesions.
b) a definitive diagnosis of an apical lesion cannot be made from a radiograph alone
c) periapical radiographs are not always indicative of loss of pulp vitality
d) a periapical radiograph can be used to locate the buccal bone level
A. a, b, c B. a and c C. b and d D. d only E. all of the above 17. A positive prolonged reaction to a heat stimulus indicates that the pulp is:
a) necrotic b) in an early hyperemic state c) normal d) irreversibly damaged
18. Which of the following is/are associated with the presence of micro-‐organisms in the bloodstream?
a) anchoresis b) cavernous sinus thrombosis c) bacteremia d) all of the above
19. Which of the following is/are true regarding a tooth filled with a formaldehyde-‐containing paste?
a) Formaldehyde containing pastes remain non-‐approved
b) the drug manufacturer may be liable, along with the dentist
c) Formaldehyde containing pastes have a high antigenic potential
d) there are cases on record of parasthesisa following overextrusion of such a paste in the vicinity of the mandibular nerve
e) all of the above
Truth or dare
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20. The desired termination point of apical root canal preparation when performing endodontic treatment on a vital tooth is:
a) 0.5 to 1mm short of the radiographic apex
b) 3mm short of the radiographic apex c) slightly through the apical foramen d) to the point where the patient feels
sensation