Local complication of local anesthesia #WikiDentia

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1. Needle breakage occurs most frequently during which nerve block?

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a. Infraorbital.

b. Nasopalatine.

c. Inferior alveolar.

d. Posterior superior alveolar

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2. Needle breakage always occurs

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a. at the hub.

b. along the shaft.

c. at the tip of the bevel.

d. at the base of the bevel.

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3. Paresthesia is best defined as

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a. bilateral anesthesia.

b. transient anesthesia.

c. persistent anesthesia.

d. inadequate anesthesia.

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4. Which is least likely to elicit paresthesia?

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a. Hemorrhage near the neural sheath.

b. Administration of bupivacaine HCl.

c. Injection of a contaminated anesthetic.

d. Trauma to the nerve sheath via needle contact.

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5. Most paresthesias resolve without treatment within

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a. 72 hours.

b. 3 weeks.

c. 2 months.

d. 1 year.

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6. Transient facial paralysis is associated with which injection?

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a. Inferior alveolar nerve block (IANB).

b. Middle superior alveolar (MSA).

c. Posterior superior alveolar (PSA).

d. Anterior middle superior alveolar (AMSA).

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7. Transient facial paralysis results when which cranial nerve is anesthetized?

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a. V.

b. VII.

c. IX.

d. XI.

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8. A prolonged jaw muscle spasm, which restricts the opening of the mouth, is called

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a. ageusia.

b. trismus.

c. paralysis.

d. dysesthesia.

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9. When initial attempts to abate trismus fail, which element is added to the treatment?

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a. Aspirin.

b. Antibiotics.

c. Heat therapy.

d. Physiotherapy.

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10. The possibility that an infection will develop from a self-inflicted soft tissue injury is

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a. certain.

b. likely.

c. unlikely.

d. remote.

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11. A hematoma rarely develops following which injection?

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a. Mental.

b. Nasopalatine.

c. Inferior alveolar.

d. Posterior superior alveolar.

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12. The swelling and discoloration of a hematoma gradually resolves within

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a. 5–7 days.

b. 7–14 days.

c. 12–24 hours.

d. 48–72 hours.

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13. Which needle-induced hematoma is only visible within the mouth?

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a. Buccal.

b. Incisive.

c. Anterior superior alveolar.

d. Posterior superior alveolar.

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14. Which therapy is NOT recommended, for at least 4–6 hours after a hematoma develops?

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a. Ice.

b. Heat.

c. Pressure.

d. Analgesic.

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15. Which increases pain on injection?

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a. Sharp needle.

b. Rapid deposition.

c. Buffered local anesthetic.

d. Topical anesthetic before injection.

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16. The ideal rate of injection to inject local anesthetic is

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a. 1 mL/min.

b. 1.8 mL/min.

c. 2 mL/min.

d. 2.5 mL/min.

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17. Which statement is true?

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a. Postinjection infection is a common occurrence in dentistry.

b. Normal oral flora is a major contributor to postinjection infection.

c. The primary cause of postinjection infection is contaminated anesthetic.

d. The needle is always contaminated when it touches the oral mucous membrane.

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18. The presence of a low-grade postinjection infection is realized when

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a. a hematoma develops.

b. paralysis becomes evident.

c. treatment for trismus is ineffective.

d. postanesthetic intraoral lesions appear.

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19. Which antibiotic is prescribed for the treatment of postinjection infection?

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a. Penicillin V.

b. Tetracycline.

c. Erythromycin.

d. Sulfacetamide.

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20. Each of these produces edema EXCEPT one. Which is the EXCEPTION?

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a. Low-grade infection.

b. Trauma during injection.

c. Topical anesthetic allergy.

d. Prolonged application of topical anesthetic.

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