Local Anesthesia Trivia Questions: Quiz

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Local Anesthesia Trivia Questions: Quiz - Quiz

There are different ways that medical practitioners try and sedate a patient and one of the most common forms is where only a section of a patient’s body is made devoid of sensation. This technique is common for patients who have simple procedures that don’t involve them staying overnight at the hospital. This quiz tests your ability to give anaesthesia to patients in the correct manner. Test yourself!


Questions and Answers
  • 1. 

    Of the following which is the MOST important prior to performing dental treatment including giving local anesthesia?

    • A.

      Vital signs to determine the baseline in the event of an emergency

    • B.

      Visual inspection to determine the overall physical state of the patient

    • C.

      Dialogue history, to ensure the patient has answered truthfully

    • D.

      Medical history questionnaire, thoroughly reviewed and updated

    • E.

      Treatment plan and patient consent forms completed

    Correct Answer
    D. Medical history questionnaire, thoroughly reviewed and updated
    Explanation
    The most important prior to performing dental treatment, including giving local anesthesia, is to thoroughly review and update the patient's medical history questionnaire. This is crucial because it provides important information about the patient's overall health, any pre-existing medical conditions, allergies, medications, and previous surgeries. This information is vital for the dentist to assess any potential risks or complications during the dental procedure and to determine the appropriate treatment plan. It helps to ensure the safety and well-being of the patient during the dental treatment.

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  • 2. 

    Why do we implement "ideal patient positioning"?

    • A.

      To reduce the risk of syncope

    • B.

      To speed the onset of anesthesia

    • C.

      To keep the syringe out of a patient's sight

    • D.

      To ensure clinician caan obtain a firm hand rest

    • E.

      To slow the absorption of anesthetic into bloodstream

    Correct Answer
    A. To reduce the risk of syncope
    Explanation
    98% of office emergencies are related to the administration of anesthesia. 50% of those are syncope from patients passing out due to nervousness, etc.

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  • 3. 

    Which of the following is the best patient positioning while delivering local anesthetic?

    • A.

      Knees above sea level

    • B.

      Heart and hands parallel to the floor

    • C.

      Head and heart parallel to the floor

    • D.

      Toes above the nose

    • E.

      Hear and heart parallel, toes slightly elevated

    Correct Answer
    E. Hear and heart parallel, toes slightly elevated
    Explanation
    The best patient positioning while delivering local anesthetic is to have the head and heart parallel to the floor, with toes slightly elevated. This position helps to maximize blood flow to the brain and minimize the risk of complications such as fainting or dizziness. By keeping the head and heart at the same level, blood circulation is optimized, and elevating the toes slightly helps to further improve blood flow.

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  • 4. 

    The main reason to inject slowly is to accomplish which of the following?

    • A.

      Make the injection as comfortable as possible

    • B.

      Not disturb the homeostasis of the tissues

    • C.

      Lessen the chance of anesthetic overdose

    • D.

      Ensure you are not in a blood vessel

    • E.

      Lessen the chance of a hematoma developing

    Correct Answer
    C. Lessen the chance of anesthetic overdose
    Explanation
    Slowly injecting allows for decreased toxicity, safety, and slow absorption.

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  • 5. 

    The nerve that can be inadvertently anesthetized during an IA injection is what?

    • A.

      Facial nerve

    • B.

      Trigeminal nerve

    • C.

      Zygomatic nerve

    • D.

      Middle meningeal nerve

    • E.

      Buccal nerve

    Correct Answer
    A. Facial nerve
    Explanation
    Facial and parotid.

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  • 6. 

    Which of the following injection types will provide the longest duration?

    • A.

      Nerve block

    • B.

      Field block

    • C.

      Supraperiosteal

    • D.

      Infiltration

    • E.

      Intrasseptal

    Correct Answer
    A. Nerve block
    Explanation
    A nerve block is a type of injection that involves injecting an anesthetic directly into or around a nerve to block pain signals. This method provides the longest duration of pain relief compared to the other options listed. Nerve blocks can provide pain relief for several hours or even days, depending on the specific procedure and the individual's response to the anesthetic. This is because the anesthetic directly affects the nerve, numbing the area and preventing pain signals from being transmitted to the brain.

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  • 7. 

    The maxillary division of the Trigeminal nerve travels anteriorly and downward to exit the cranium through which foramen?

    • A.

      Ovale

    • B.

      Spinosum

    • C.

      Magnum

    • D.

      Rotundum

    • E.

      Superior orbital

    Correct Answer
    D. Rotundum
    Explanation
    The maxillary division of the Trigeminal nerve exits the cranium through the foramen rotundum.

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  • 8. 

    Following the administration of a right PSA nerve block, the patient complains that tooth #3 is still sensitive.  What is most likely the cause of this?

    • A.

      Deposition was too low

    • B.

      Deposition was too anterior

    • C.

      The mesiobuccal root of the 1st molar was not anesthetized with the PSA

    • D.

      Local anesthetic solution has probably expired

    • E.

      Insufficient amount of anesthetic deposited

    Correct Answer
    C. The mesiobuccal root of the 1st molar was not anesthetized with the PSA
    Explanation
    Because the PSA does not get the mesial buccal root of the 1st molar, they need an MSA.

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  • 9. 

    In order to have a proper duration of a PSA, how much total anesthetic will you give?

    • A.

      0.6-0.9 ml

    • B.

      0.9-1.8 ml

    • C.

      1.5-1.8 ml

    • D.

      0.9-1.2 ml

    • E.

      .45-.9 ml

    Correct Answer
    B. 0.9-1.8 ml
    Explanation
    Half to a full cartridge.

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  • 10. 

    The Vazirani-Akinosi mandibular technique is recommended for what type of patients?

    • A.

      Children

    • B.

      Large boned

    • C.

      Reduced opening

    • D.

      Enlarged tongue

    • E.

      Autistic

    Correct Answer
    C. Reduced opening
    Explanation
    Patients who cannot open their mouths wide enough, or pain in the jaw joints.

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  • 11. 

    Pressure syringes are primarily designed to deliver what type of injection?

    • A.

      Palatal

    • B.

      Intraosseous

    • C.

      Intraseptal

    • D.

      Periodontal ligament

    • E.

      Incisive/mental

    Correct Answer
    D. Periodontal ligament
    Explanation
    PDL (also intraligamentary)

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  • 12. 

    If a right-handed clinician contacts bone too soon (one half penetration depth or less) on the left IA nerve block, what should be done?

    • A.

      Withdraw and select a penetration site more posterior

    • B.

      Immediately redirect needle/syringe more laterally

    • C.

      Withdraw slightly, redirect needle/syringe more medially

    • D.

      Withdraw and select a penetration site more medially

    • E.

      Withdraw slightly, redirect needle/syringe more laterally

    Correct Answer
    C. Withdraw slightly, redirect needle/syringe more medially
    Explanation
    Redirect syringe or pull out and go back in a little higher.

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  • 13. 

    What is the recommended amount of anesthetic deposited for the Gow-Gates injection technique?

    • A.

      1.5 ml

    • B.

      1.8 ml

    • C.

      1.2 ml

    • D.

      1.3 ml

    • E.

      1.0 ml

    Correct Answer
    B. 1.8 ml
    Explanation
    1.8-3.0 ml.

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  • 14. 

    What type of injection is contraindicated in primary teeth?

    • A.

      Intraosseous

    • B.

      Infraorbital

    • C.

      Periodontal ligament

    • D.

      Posterior superior alveolar

    • E.

      Inferior alveolar

    Correct Answer
    C. Periodontal ligament
    Explanation
    The periodontal ligament injection is contraindicated in primary teeth. This type of injection involves injecting the anesthetic solution directly into the ligament surrounding the tooth. However, in primary teeth, the roots are not fully formed, and the periodontal ligament is not well developed. Therefore, this injection technique may cause damage to the developing tooth and surrounding structures. It is important to use alternative injection techniques, such as infiltration or nerve block, in primary teeth.

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  • 15. 

    Applying topical for longer than indicated can result in sloughing of the tissues - this is officially called what?

    • A.

      Epithelial desquamation

    • B.

      Sterile abscess

    • C.

      Cheek rot

    • D.

      White lacy striations

    • E.

      Epithelial dysplasia

    • F.

      Epithelial dysplasia

    Correct Answer
    A. Epithelial desquamation
    Explanation
    Applying topical for longer than indicated can cause the sloughing of tissues, which is officially called epithelial desquamation. Epithelial desquamation refers to the shedding or peeling of the outermost layer of skin or mucous membranes. It can occur as a result of various factors, including prolonged use of certain topical medications or treatments.

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  • 16. 

    Persistent paresthesia following a local anesthetic injection.

    • A.

      Is always preventable

    • B.

      Is often caused by a needle penetrating the cheek

    • C.

      Is always reversible

    • D.

      Is desirable

    • E.

      Is the most common on the tip/side of the tongue

    Correct Answer
    E. Is the most common on the tip/side of the tongue
    Explanation
    Can happen on the lower lip or the tip of the tongue, tip of the tongue is most common.

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  • 17. 

    Trismus is best defined as what?

    • A.

      A low grade infection

    • B.

      A holiday in December

    • C.

      Anesthesia that doesn't "wear off"

    • D.

      Trauma to muscles and/or blood vessels

    • E.

      A flooding or pooling of blood

    Correct Answer
    D. Trauma to muscles and/or blood vessels
    Explanation
    Can cause prolonged spasms and abnormal opening.

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  • 18. 

    An epinephrine overdose reaction.

    • A.

      Usually requires formal management

    • B.

      Requires placing the patient in a supine position

    • C.

      May manifest as anxiety or restlessness

    • D.

      Minimally affects blood pressure and heart rate

    • E.

      Indicates an epinephrine allergy

    Correct Answer
    C. May manifest as anxiety or restlessness
    Explanation
    Can cause fear, anxiety, increase BP and pulse, sweating, and headache.

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  • 19. 

    A patient suffering from local anesthetic overdose induced seizures should be given what?

    • A.

      Oxygen only

    • B.

      Glucose

    • C.

      Oxygen and diazepam

    • D.

      Oxygen and epinephrine

    • E.

      Oxygen and diphenhydramine

    Correct Answer
    C. Oxygen and diazepam
    Explanation
    Diazepam (valium) IM and O2

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  • 20. 

    After administering topical Benzocaine 20% and 3% Mepivacaine with epinephrine 1:100,000, the patient complains of intense itching of the face and is feeling a tightening in the throat.  What is most likely the cause of this reaction?

    • A.

      The patient is experiencing psychogenic anxiety

    • B.

      The anesthetic was injected too rapidly

    • C.

      The patient is having a reaction to the epinephrine

    • D.

      The patient is allergic to the Benzocaine

    • E.

      The patient is having an idiosyncratic reaction

    Correct Answer
    D. The patient is allergic to the Benzocaine
    Explanation
    The cause is most likely an allergy to the ester.

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  • 21. 

    All of the following are acceptable alternatives for an anesthetic-allergic patient except one, which is the exception?

    • A.

      Hypnosis

    • B.

      Electronic dental anesthesia

    • C.

      Use limited amounts of esters

    • D.

      Use general anesthesia

    • E.

      Use limited amounts of sterile Benadryl

    Correct Answer
    C. Use limited amounts of esters
    Explanation
    Alternatives include amides, general anesthesia, histamine blockers, NO2, hypnosis, electric anesthesia.

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  • 22. 

    All of the following patients represent a potential for a local anesthetic overdose except one, which is the exception?

    • A.

      Pregnant women

    • B.

      Patients with hepatitis

    • C.

      A marathon runner

    • D.

      Highly anxious patients

    • E.

      A sweet little child

    Correct Answer
    C. A marathon runner
    Explanation
    Just because a patient runs marathons does not make them at risk for potential local anesthetic overdose.

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  • 23. 

    If a patient has an allergy to esters, which of the following topical anesthetics should not be used?

    • A.

      Lidocaine

    • B.

      Denti-patch

    • C.

      Benzocaine

    • D.

      Pressure

    • E.

      Betadine

    Correct Answer
    C. Benzocaine
    Explanation
    Benzocaine, or any other drug that has only one "i" in the name.

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  • 24. 

    You administer 2% lidocaine with epinephrine 1:50,000 into the palate of your patient.  Three days later, they call complaining of a large sore on the roof of their mouth.  What is the sore MOST likely to be?

    • A.

      Herpes simplex virus

    • B.

      Aphthous ulcer

    • C.

      Epithelial desquamation

    • D.

      Sterile abscess

    • E.

      Necrotizing sialiometaplasia

    Correct Answer
    D. Sterile abscess
    Explanation
    The most likely explanation for the large sore on the roof of the patient's mouth is a sterile abscess. Lidocaine is a local anesthetic commonly used in dental procedures, and it is possible for a sterile abscess to occur as a result of the injection. This type of abscess is characterized by the accumulation of sterile fluid or pus, causing swelling and pain in the affected area.

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  • 25. 

    Your patient is a 190 lb man.  He was scheduled with the dentist prior to seeing you today.  The dentist used 3 cartridges of 4% Articaine with epinephrine 1:100,000.  He is becoming sensitive during root planing and scaling.  How many additional cartridges of 2% lidocaine with epinephrine 1:100,000 can he have?

    • A.

      2.3

    • B.

      4.5

    • C.

      7.3

    • D.

      3.8

    • E.

      1.9

    Correct Answer
    A. 2.3
    Explanation
    The given correct answer is 2.3. This can be determined by calculating the maximum safe dose of lidocaine with epinephrine that the patient can have. The patient's weight of 190 lb is used to calculate the maximum safe dose, which is 7 mg/kg or 3.18 mg/lb. Multiplying this by the patient's weight gives 604.2 mg. Since each cartridge of 2% lidocaine with epinephrine contains 36 mg of lidocaine, dividing the maximum safe dose by this amount gives approximately 16.8 cartridges. Since the patient has already received 3 cartridges of 4% Articaine, subtracting this from the maximum safe dose gives 13.8 cartridges. Rounding down to the nearest tenth gives the answer of 2.3 additional cartridges.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 19, 2012
    Quiz Created by
    Rdhtobe
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