Dental Anesthesia MCQs 200 4dd. Dr.Tong Leang

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    Manifestation of systemic toxicity

    • CNS toxicity, cardiovascular toxicity and neurological symptoms
    • CNS toxicity
    • Cardiovascular toxicity
    • Neurological symptoms
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About This Quiz

Dental anesthesia MCQs 200 4DD by Dr. Tong Leang tests knowledge on surface activity, methemoglobinemia, vasoconstrictors, injection techniques, nerve supply, and intravenous regional anesthesia in dental procedures.

Dental Anesthesia MCQs 200 4dd. Dr.Tong Leang - Quiz

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  • 2. 

    Which one are the three major types of local anesthesia can be performed in the maxillary for pain control?

    • Infiltration, field block, and nerve block

    • Nerve block, field block, and topical

    • Field block, infiltration , and intraseptal

    • Field block, infraorbital , intraosseus

    Correct Answer
    A. Infiltration, field block, and nerve block
    Explanation
    The correct answer is "Infiltration, field block, and nerve block." Infiltration anesthesia involves injecting the anesthetic solution directly into the tissues surrounding the tooth or area being treated. Field block anesthesia involves injecting the anesthetic solution near a nerve trunk to numb a larger area. Nerve block anesthesia involves injecting the anesthetic solution near a specific nerve to numb a specific area, such as the maxillary nerve for pain control in the maxilla.

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  • 3. 

    The technique insertion of mucobuccal fold between apex of 2nd and 3rd molars at 45 degree is called

    • PSA, nerve block

    • MSA, nerve block

    • ASA, nerve block

    • Infraorbital nerve block

    Correct Answer
    A. PSA, nerve block
    Explanation
    The technique described in the question involves inserting the mucobuccal fold between the apex of the 2nd and 3rd molars at a 45-degree angle. This technique is known as the PSA (Posterior Superior Alveolar) nerve block. The PSA nerve block is commonly used in dentistry to anesthetize the maxillary molars and surrounding tissues. It involves injecting local anesthetic near the PSA nerve, which supplies sensation to the maxillary molars. This block is effective in achieving profound anesthesia in the posterior maxilla.

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  • 4. 

    Which technique is useful for infected patients with trismus, fractured mandibles, and mentally handicapped individuals

    • Akinosi Nerve Block(R)

    • IAN Block

    • Mental nerve Block

    • Lomng Buccal Nerve Block

    Correct Answer
    A. Akinosi Nerve Block(R)
    Explanation
    The Akinosi Nerve Block is useful for infected patients with trismus, fractured mandibles, and mentally handicapped individuals. Trismus refers to the condition of restricted mouth opening, which can make it difficult to administer other nerve blocks. The Akinosi Nerve Block is an alternative technique that involves injecting anesthetic near the coronoid notch, which allows the anesthetic to diffuse to the inferior alveolar nerve and provide effective anesthesia. This technique is particularly beneficial for patients with limited mouth opening or cognitive impairments, as it can be performed with the patient's mouth slightly open.

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  • 5. 

    When procaine undergoes metabolic breakdown, the major metabolic product (metabolite) is what?

    • Para-aminobenzoic acid

    • Pseudocholinesterase

    • Chloroprocaine

    • Succinylcholine

    Correct Answer
    A. Para-aminobenzoic acid
    Explanation
    When procaine undergoes metabolic breakdown, it is converted into para-aminobenzoic acid. This is the major metabolic product or metabolite of procaine.

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  • 6. 

    One of the many proprietary names for lidocaine is what?

    • Xylocaine HCL

    • 35%Polocaine

    • Sandonest HCL

    • Mepivacaine

    • Candicaine HCL

    Correct Answer
    A. Xylocaine HCL
    Explanation
    Xylocaine HCL is one of the many proprietary names for lidocaine. Lidocaine is a commonly used local anesthetic that is used to numb a specific area of the body during medical procedures or surgeries. Xylocaine HCL is a specific formulation of lidocaine that is available in the form of a hydrochloride salt. It is used for various purposes such as dental procedures, minor surgeries, and as a numbing agent for certain medical conditions.

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  • 7. 

    The antioxidant used to preserve epinephrine in a local anesthetic solution is?

    • Sodium bisulfate

    • Sodium bicarbonate

    • Sodium chloride

    • Sodium pentanol

    • Sodium hydrochloride

    Correct Answer
    A. Sodium bisulfate
    Explanation
    Sodium bisulfate is used as an antioxidant to preserve epinephrine in a local anesthetic solution. Antioxidants are substances that prevent the oxidation of other compounds, thereby preserving their stability and effectiveness. In this case, sodium bisulfate helps to protect epinephrine from degradation caused by oxidation, ensuring its potency and efficacy in the local anesthetic solution.

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  • 8. 

    Stacey, a 18 year old soccer player, arrives for extraction of teeth #4,12, and 20, and she is given 5 cartridges of 4% Articaine with epi 1:100,000.Her mother calls 3 hours following the appointment stating that Stacey appears cyanotic and sluggish. Her nail beds look dark and the blood in the extraction sites is chocolate brown. What is MOST likely the condition presented?

    • Methemoglobinemia

    • A typical plasma cholinesterase

    • Malignant hyperthermia

    • Local anesthetic overdose

    • Local anesthetic allergy

    Correct Answer
    A. Methemoglobinemia
    Explanation
    The symptoms described, such as cyanosis, sluggishness, dark nail beds, and chocolate brown blood, are consistent with methemoglobinemia. Methemoglobinemia is a condition where the iron in hemoglobin is oxidized, resulting in reduced oxygen-carrying capacity of the blood. It can be caused by certain medications, including local anesthetics like Articaine. In this case, the high dosage of Articaine with epi 1:100,000 may have led to methemoglobinemia in Stacey, causing her symptoms.

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  • 9. 

    Epinephrine added to a solution of lidocaine for local anesthesia will:?

    • Increase the duration of local anesthesia

    • Cause cyanosis locally.

    • Increase the risk of convulsion.

    • Increase the absorption of lidocaine

    • Decrease the heart rate when absorbed.

    Correct Answer
    A. Increase the duration of local anesthesia
    Explanation
    Epinephrine is often added to a solution of lidocaine for local anesthesia because it acts as a vasoconstrictor, meaning it constricts blood vessels in the area. This helps to decrease blood flow and reduce the rate at which the lidocaine is metabolized and absorbed by the body. As a result, the duration of the local anesthesia is increased, allowing for longer-lasting pain relief.

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  • 10. 

    Vasoconstrictor in local anesthetic(LA) solution is used to ?

    • Reduces toxic effects of LA

    • Decreases depth & duration LA.

    • Increases bleeding.

    • Increases toxic effects of LA

    Correct Answer
    A. Reduces toxic effects of LA
    Explanation
    The vasoconstrictor in a local anesthetic (LA) solution is used to reduce the toxic effects of the LA. Vasoconstrictors work by constricting the blood vessels at the site of administration, which in turn reduces the absorption of the LA into the bloodstream. This helps to minimize the systemic toxicity of the LA and allows for a higher concentration of the LA to remain at the site of action, prolonging its duration and depth of anesthesia.

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  • 11. 

    Correct statements concerning lidocaine include all of the following EXCEPT:?

    • It has esteratic linkage

    • It is an universal anesthetic

    • It widely used as an antiarrhythmic agent

    • It is metabolized in liver

    Correct Answer
    A. It has esteratic linkage
    Explanation
    Lidocaine is a local anesthetic that is widely used for its numbing effects. It is not an universal anesthetic, as it is primarily used for local anesthesia rather than general anesthesia. Additionally, lidocaine is not known for having esteratic linkage, which refers to a specific type of chemical bond. However, it is metabolized in the liver, making it important to consider liver function when administering lidocaine. Furthermore, lidocaine is also used as an antiarrhythmic agent to treat abnormal heart rhythms.

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  • 12. 

    Factors which increase local anesthetic CNS toxicities:?

    • Rate of injection, patient receiving mexiletine (Mexitil) when lidocaine (Xylocaine) is used and high PaCO2 (reduced local anesthetic seizure threshold)

    • Hypokalemia

    • Rate of injection

    • Patient receiving mexiletine (Mexitil) when lidocaine (Xylocaine) is used

    • High PaCO2 (reduced local anesthetic seizure threshold)

    Correct Answer
    A. Rate of injection, patient receiving mexiletine (Mexitil) when lidocaine (Xylocaine) is used and high PaCO2 (reduced local anesthetic seizure threshold)
    Explanation
    The factors that increase local anesthetic CNS toxicities are the rate of injection, patient receiving mexiletine (Mexitil) when lidocaine (Xylocaine) is used, and high PaCO2 (reduced local anesthetic seizure threshold).

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  • 13. 

    Surface activity and low toxic potential?

    • Benzocaine

    • Cocaine

    • Bupivacaine

    • Procaine

    • Lidocaine

    Correct Answer
    A. Benzocaine
    Explanation
    Benzocaine is the correct answer because it exhibits surface activity and has a low toxic potential. Surface activity refers to the ability of a substance to interact with the surface of a material or tissue. Benzocaine is commonly used as a topical anesthetic, meaning it is applied directly to the surface of the skin or mucous membranes to numb the area. It is known for its low toxicity, meaning it is relatively safe to use and has a low risk of causing harmful side effects.

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  • 14. 

    Technique of anesthesia in which local anesthetic solution is injected into the vein is ?

    • Intra venous regional anesthesia

    • Nerve block

    • Infiltration anesthesia

    • Epidural anesthesia

    • No such technique exists.

    Correct Answer
    A. Intra venous regional anesthesia
    Explanation
    Intra venous regional anesthesia is the technique of anesthesia in which a local anesthetic solution is injected into the vein. This allows for the anesthetic to be distributed throughout the body via the bloodstream, providing a regional anesthesia effect. This technique is commonly used for procedures that require a larger area of the body to be numbed or for longer durations of anesthesia.

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  • 15. 

    Common eutectic mixture of local anesthetics (EMLA)?

    • Lidocaine (Xylocaine) and prilocaine (Citanest)

    • Tetracaine (pontocaine) and epinephrine

    • Lidocaine (Xylocaine) and tetracaine (pontocaine)

    • Prilocaine (Citanest) and bupivacaine (Marcaine)

    • Tetracaine (pontocaine) and bupivacaine (Marcaine)

    Correct Answer
    A. Lidocaine (Xylocaine) and prilocaine (Citanest)
    Explanation
    The common eutectic mixture of local anesthetics (EMLA) is lidocaine (Xylocaine) and prilocaine (Citanest). This combination is often used as a topical anesthetic to numb the skin before certain medical procedures. Lidocaine is a fast-acting local anesthetic that works by blocking nerve signals in the area where it is applied, while prilocaine helps to enhance the numbing effect. Together, they provide effective pain relief for minor procedures such as needle insertions, skin grafts, and the removal of warts or moles.

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  • 16. 

    Factor(s) that reduce lidocaine (Xylocaine) seizure threshold.?

    • Hypoxemia, Hyperkalemia and Acidosis

    • Hypoxemia

    • Hyperkalemia

    • Acidosis

    Correct Answer
    A. Hypoxemia, Hyperkalemia and Acidosis
    Explanation
    Hypoxemia, hyperkalemia, and acidosis are all factors that can reduce the seizure threshold of lidocaine (Xylocaine). Hypoxemia refers to low levels of oxygen in the blood, which can impair brain function and increase the risk of seizures. Hyperkalemia is an elevated level of potassium in the blood, which can disrupt the electrical activity of the brain and make it more prone to seizures. Acidosis is a condition characterized by excessive acidity in the blood, which can also interfere with normal brain function and lower the seizure threshold. Therefore, the presence of any of these factors can increase the likelihood of experiencing seizures when using lidocaine.

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  • 17. 

    Ropivacaine (Naropin):less cardiotoxic then bupivacaine (Marcaine)

    • True

    • False

    • .

    • .

    Correct Answer
    A. True
    Explanation
    Ropivacaine (Naropin) is indeed less cardiotoxic than bupivacaine (Marcaine). Cardiotoxicity refers to the potential of a drug to cause harm to the heart. Ropivacaine, a local anesthetic, has been found to have a lower risk of causing adverse effects on the cardiovascular system compared to bupivacaine. This makes it a safer option for certain medical procedures where local anesthesia is required.

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  • 18. 

    Factor(s) which determine extent of systemic local anesthetic absorption:

    • All are not correct

    • Initial dose

    • Injection site vascularity

    • Intrinsic drug properties

    • Whether or not epinephrine was used to provide local vasoconstriction

    Correct Answer
    A. All are not correct
    Explanation
    The extent of systemic local anesthetic absorption is not determined by any of the factors mentioned in the options. The correct answer implies that factors other than the initial dose, injection site vascularity, intrinsic drug properties, or the use of epinephrine for local vasoconstriction play a role in determining the extent of systemic local anesthetic absorption. The question suggests that there are additional factors that need to be considered.

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  • 19. 

    The axons of peripheral nerve is supported by

    • Support by Connective tissue

    • Supported by cell

    • Support by muscle

    • Support by blood

    Correct Answer
    A. Support by Connective tissue
    Explanation
    The correct answer is support by connective tissue because the axons of peripheral nerves are surrounded and protected by connective tissue called the endoneurium. This connective tissue provides structural support and helps to maintain the integrity of the nerve fibers. Additionally, connective tissue layers called the perineurium and epineurium surround and protect bundles of axons, providing further support and protection to the peripheral nerves.

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  • 20. 

    The function organization of axon and schwann cell is called

    • Nerve fiber

    • Nerve cell

    • Neuron cell

    • Call myelin sheath

    Correct Answer
    A. Nerve fiber
    Explanation
    The correct answer is Nerve fiber. The function organization of axon and Schwann cell is referred to as a nerve fiber. The axon is a long, slender projection of a nerve cell that transmits electrical impulses, while the Schwann cell is a type of glial cell that wraps around the axon to form the myelin sheath, which insulates and protects the nerve fiber. Together, the axon and Schwann cell make up the nerve fiber.

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  • 21. 

    Which one is the best answer for nerve block of local anesthesia in the maxillary nerve block?

    • PSA, MSA,ASA, Infraorbital , Greater palatine , and Naso palatine nerve

    • Supraperiosteal injection, infraseptal injection and periodontal ligament injection

    • PSA,MSA,ASA, Mental Nerve, Inferior Alveolar Nerve Block and lingual nerve block

    • PSA,MSA,ASA, Greater Palatine and Lingual Nerve block

    Correct Answer
    A. PSA, MSA,ASA, Infraorbital , Greater palatine , and Naso palatine nerve
    Explanation
    The correct answer includes the PSA, MSA, ASA, Infraorbital, Greater palatine, and Naso palatine nerves. These nerves are all involved in providing anesthesia to the maxillary region. The PSA (posterior superior alveolar) nerve block is commonly used to anesthetize the maxillary molars. The MSA (middle superior alveolar) nerve block is used for anesthesia of the maxillary premolars. The ASA (anterior superior alveolar) nerve block is used for anesthesia of the maxillary incisors and canine. The infraorbital, greater palatine, and naso palatine nerves are also included as they provide additional innervation to the maxillary region.

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  • 22. 

    The area used to anesthetized the maxillary premolars, corresponding alveolus, and buccal gingival tissue is called

    • MSA nerve block

    • PSA nerve block

    • ASA nerve block

    • Naso palatine nerve block

    Correct Answer
    A. MSA nerve block
    Explanation
    The correct answer is MSA nerve block. The MSA (Middle Superior Alveolar) nerve block is used to anesthetize the maxillary premolars, corresponding alveolus, and buccal gingival tissue. It is a common technique used in dentistry to numb the upper teeth and surrounding tissues for dental procedures. The MSA nerve block effectively blocks the sensory nerves in the area, providing pain relief and allowing for a comfortable dental experience.

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  • 23. 

    The technique of insertion at mucobuccal fold in the area of 1st and 2nd premolars is called

    • MSA nerve block

    • PSA nerve block

    • ASA nerve block

    • Infraorbital nerve block

    Correct Answer
    A. MSA nerve block
    Explanation
    The technique of inserting anesthesia at the mucobuccal fold in the area of the 1st and 2nd premolars is known as the MSA nerve block. This technique involves injecting anesthesia near the middle superior alveolar nerve to numb the upper premolar teeth and surrounding tissues. The MSA nerve block is commonly used in dentistry to provide pain relief during dental procedures in this specific area.

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  • 24. 

    The technique of insertion at mucobuccal fold in the area of lateral incisor and canine on maxillary is called

    • ASA nerve block technique

    • PSA nerve block technique

    • MSA nerve block technique

    • Greater palatine nerve block technique

    Correct Answer
    A. ASA nerve block technique
    Explanation
    The correct answer is ASA nerve block technique. This technique involves the insertion of the anesthetic solution at the mucobuccal fold in the area of the lateral incisor and canine on the maxillary arch. It is used to numb the anterior teeth and surrounding tissues on the upper jaw.

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  • 25. 

    When given nerve block , will also cause anesthetized to the lower eyelid, lateral aspect of nasal skin tissue, and skin of infraorbital region is called

    • Infraorbital nerve block

    • Posterior superior alveolar nerve block

    • Middle superior alveolar nerve block

    • Anterior superior alveolar nerve block

    Correct Answer
    A. Infraorbital nerve block
    Explanation
    An infraorbital nerve block is the correct answer because it involves anesthetizing the lower eyelid, lateral aspect of nasal skin tissue, and skin of the infraorbital region. This block targets the infraorbital nerve, which is a branch of the maxillary nerve. By injecting local anesthetic around the infraorbital foramen, which is located on the maxilla bone, the nerve can be blocked, resulting in anesthesia of the specified areas.

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  • 26. 

    The technique can be used to anesthetize the soft and hard tissue of the maxillary anterior palate from canine to canine is called

    • Naso palatine nerve block

    • Greater palatine nerve block

    • Infraorbital nerve block

    • Posterior superior alveolar nerve block

    Correct Answer
    A. Naso palatine nerve block
    Explanation
    The technique used to anesthetize the soft and hard tissue of the maxillary anterior palate from canine to canine is called the Naso palatine nerve block.

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  • 27. 

    The technique Provides sensory input for the lower lip skin, mucous membrane, pulpal and alveolar tissue for the premolar, canine and incisors on the side blocked is called

    • Mental Nerve Block

    • IAN Block

    • Gow-Gate Nerve Block

    • Akinosi Nerve block

    Correct Answer
    A. Mental Nerve Block
    Explanation
    The technique described in the question provides sensory input for the lower lip skin, mucous membrane, pulpal and alveolar tissue for the premolar, canine, and incisors on the side blocked. This technique is known as the Mental Nerve Block.

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  • 28. 

    The trigeminal nerve is the sensory fibres form the semilunar ganglion (the Gasserian ganglion). Where does these ganglion or Gasserian lie in the bottom of the following?

    • The middle cranial fossa

    • The posterior cranial fossa

    • The anterior cranial fossa

    • The roof of the cranial fossa

    Correct Answer
    A. The middle cranial fossa
    Explanation
    The trigeminal nerve is a cranial nerve that provides sensory information from the face to the brain. The semilunar ganglion, also known as the Gasserian ganglion, is the sensory ganglion of the trigeminal nerve. It is located in the middle cranial fossa, which is one of the three depressions in the floor of the skull that houses different parts of the brain. Therefore, the correct answer is the middle cranial fossa.

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  • 29. 

    The major factor influencing the ability to aspirate is what?

    • Gauge of the needle

    • Size of clinician hand’S

    • Site of injection

    • Size of thumb ring

    • Harpoon being sterile

    Correct Answer
    A. Gauge of the needle
    Explanation
    The gauge of the needle refers to its diameter, and it is a major factor influencing the ability to aspirate. Aspiration is the process of withdrawing fluid or checking for blood return before injecting medication. A larger gauge needle allows for easier aspiration as it creates a larger opening for fluid to be withdrawn. Therefore, the gauge of the needle directly affects the ability to aspirate effectively.

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  • 30. 

    Distilled water is added to the cartridge for what purpose?

    • To provide the volume of the solution

    • To make the solution isotonic with the tissues of the body

    • To increase the safely and the duration of the anesthetic

    • To prevent the biodegradation of the vasopressor

    • To prevent the probation of nerve impulses

    Correct Answer
    A. To provide the volume of the solution
    Explanation
    Distilled water is added to the cartridge to provide the volume of the solution. This means that the water is used to fill up the cartridge and make sure that there is enough solution for the desired purpose. It is not added for any other specific reason such as making the solution isotonic, increasing safety, preventing biodegradation, or preventing nerve impulses. The main purpose is simply to ensure that there is enough volume of the solution in the cartridge.

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  • 31. 

    At what time are professionals MOST at risk for a needle stick?

    • Recapping

    • Disassembly of syringe

    • Assembling the syringe

    • Giving the injection

    • Unsheathing the needle

    Correct Answer
    A. Recapping
    Explanation
    Professionals are most at risk for a needle stick when they are recapping the needle. Recapping involves putting the needle back into the protective cover, which can increase the chances of accidental needle sticks. This action requires careful handling and can easily lead to injuries if not done correctly.

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  • 32. 

    A patient attends for an extraction of a lower molar tooth. Following the administration of an inferior alveolar nerve block only, the patient complains of pain during the procedure.Which one of the following nerves is the most likely to be responsible for the perception of this pain?

    • Long buccal nerve

    • Facial nerve

    • Incisive nerve

    • Marginal mandibular

    • Mental nerve

    Correct Answer
    A. Long buccal nerve
    Explanation
    The long buccal nerve is the most likely to be responsible for the perception of pain during the procedure. The long buccal nerve provides sensory innervation to the buccal gingiva and mucosa of the mandibular molars. If the patient is experiencing pain during the extraction, it suggests that the long buccal nerve was not adequately anesthetized by the inferior alveolar nerve block.

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  • 33. 

    Disto buccal root of upper 1st molar is supplied by:?

    • Posterior superior alveolar nerve

    • Middle superior alveolar nerve

    • Infra orbital nerve

    • Mental nerve

    • Buccal nerve

    Correct Answer
    A. Posterior superior alveolar nerve
    Explanation
    The disto buccal root of the upper first molar is supplied by the posterior superior alveolar nerve. This nerve is a branch of the maxillary division of the trigeminal nerve and provides sensory innervation to the maxillary molars and surrounding structures. The other options listed are not responsible for supplying the disto buccal root of the upper first molar.

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  • 34. 

    What are the local anesthetic produce for:?

    • Blocking pain sensation without loss of consciousness

    • Analgesia, amnesia, loss of consciousness

    • Alleviation of anxiety and pain with an altered level of consciousness

    • A stupor or somnolent state

    Correct Answer
    A. Blocking pain sensation without loss of consciousness
    Explanation
    Local anesthetics are used to block pain sensation without causing loss of consciousness. They work by temporarily numbing a specific area of the body, preventing the nerves from transmitting pain signals to the brain. This allows medical procedures or surgeries to be performed without the patient feeling pain. Unlike general anesthesia, which can cause loss of consciousness, local anesthetics only affect the specific area where they are applied or injected.

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  • 35. 

    Which one of the following groups is responsible for the potency and the toxicity of local anesthetic?

    • Lipophylic group

    • Inonizable group

    • Intermediate chain

    • Non Ionize group

    Correct Answer
    A. Lipophylic group
    Explanation
    The lipophilic group is responsible for the potency and toxicity of local anesthetics. Lipophilic means "fat-loving" and refers to the ability of a substance to dissolve in fat. Local anesthetics need to be able to penetrate the lipid-rich cell membranes in order to reach their target sites and block nerve conduction. The lipophilic group in local anesthetics allows them to easily cross cell membranes and exert their effects. However, this lipophilicity also contributes to their toxicity, as they can accumulate in fatty tissues and potentially cause adverse effects.

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  • 36. 

    The more lipophilic drugs ?

    • All of the above

    • Are more potent

    • Have longer duration of action

    • Bind more extensively to protein

    Correct Answer
    A. All of the above
    Explanation
    Lipophilic drugs have a higher affinity for lipid-based environments, such as cell membranes, which allows them to cross these barriers more easily. This increased ability to penetrate cells often leads to increased potency, as the drug can more effectively interact with its target. Additionally, lipophilic drugs tend to have longer durations of action because they are more likely to be stored in fatty tissues and released slowly over time. Lastly, lipophilic drugs have a higher tendency to bind extensively to proteins in the body, which can affect their distribution, metabolism, and elimination. Therefore, all of the given statements are true for lipophilic drugs.

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  • 37. 

    Indicate the local anesthetic, which is a long-acting agent:?

    • Bupivacaine

    • Lidocaine

    • Procaine

    • Mepivacaine

    Correct Answer
    A. Bupivacaine
    Explanation
    Bupivacaine is a long-acting local anesthetic. It is commonly used for surgical anesthesia and postoperative pain management due to its prolonged duration of action. Bupivacaine works by blocking nerve impulses, numbing the area and providing long-lasting pain relief. Lidocaine, procaine, and mepivacaine are also local anesthetics but have shorter durations of action compared to bupivacaine.

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  • 38. 

    Which of the following local anesthetics is called a universal anesthetic?

    • Lidocaine

    • Procaine

    • Ropivacaine

    • Bupivacaine

    Correct Answer
    A. Lidocaine
    Explanation
    Lidocaine is called a universal anesthetic because it is a commonly used local anesthetic that has a broad range of applications. It can be used for various procedures, including dental work, minor surgeries, and even cardiac procedures. Lidocaine works by blocking nerve signals in a specific area, numbing the region and providing pain relief. Its versatility and effectiveness make it a popular choice among medical professionals, earning it the nickname "universal anesthetic."

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  • 39. 

    Most serious toxic reaction to local anesthetics is:?

    • All of the above

    • Seizures

    • Cardiovascular collapse

    • Respiratory failure

    Correct Answer
    A. All of the above
    Explanation
    The most serious toxic reaction to local anesthetics can include seizures, cardiovascular collapse, and respiratory failure. This means that all of the options listed (seizures, cardiovascular collapse, and respiratory failure) can be potential serious toxic reactions to local anesthetics.

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  • 40. 

    Most local anesthetics can cause:?

    • All of the above

    • Depression of abnormal cardiac pacemaker activity, excitability, conduction

    • Depression of the strength of cardiac contraction

    • Cardiovascular collapse

    Correct Answer
    A. All of the above
    Explanation
    Most local anesthetics can cause depression of abnormal cardiac pacemaker activity, excitability, and conduction. They can also cause depression of the strength of cardiac contraction and cardiovascular collapse. Therefore, all of the above options are correct.

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  • 41. 

    Which of the following local anesthetics is more likely to cause allergic reaction?

    • Procaine

    • Lidocaine

    • Bupivacaine

    • Ropivacaine

    Correct Answer
    A. Procaine
    Explanation
    Procaine is more likely to cause an allergic reaction compared to the other local anesthetics listed. This is because procaine is a ester-type local anesthetic, and ester-type anesthetics have been associated with a higher risk of allergic reactions. Lidocaine, bupivacaine, and ropivacaine are all amide-type local anesthetics, which generally have a lower risk of causing allergic reactions.

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  • 42. 

    When injecting Local solutionin maxilla on buccal side. The technique is ?

    • Supra periosteal

    • Sup periosteal

    • Sup mucosal

    • Intra osseous

    • Intra septal

    Correct Answer
    A. Supra periosteal
    Explanation
    The correct technique for injecting a local solution in the maxilla on the buccal side is the supra periosteal technique. This involves injecting the solution just above the periosteum, which is the membrane that covers the outer surface of the bone. This technique allows for effective anesthesia in the area and helps to minimize discomfort for the patient.

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  • 43. 

    You notice a lesion on the labial alveolar mucosa of the lower right lateral incisor tooth of one of your patients and decide to take a biopsy to send for oral pathology report Which nerve would require local anesthesia in order to carry out a pain-free biopsy?

    • The incisive nerve

    • The buccal nerve

    • The lingual nerve

    Correct Answer
    A. The incisive nerve
    Explanation
    The incisive nerve would require local anesthesia in order to carry out a pain-free biopsy. The incisive nerve is responsible for providing sensory innervation to the labial alveolar mucosa of the lower anterior teeth, including the lateral incisor tooth. By administering local anesthesia to the incisive nerve, the patient will not feel any pain during the biopsy procedure.

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  • 44. 

    Which one are called local anesthesia nerve block?

    • PSA , MSA, ASA

    • Periodontal ligament injection

    • Intraseptal injections

    • Supraperiosteal injection

    Correct Answer
    A. PSA , MSA, ASA
    Explanation
    The correct answer is PSA, MSA, and ASA. These are called local anesthesia nerve block techniques. Local anesthesia nerve block involves injecting an anesthetic solution near a nerve to block the transmission of pain signals. PSA stands for posterior superior alveolar nerve block, MSA stands for middle superior alveolar nerve block, and ASA stands for anterior superior alveolar nerve block. These techniques are commonly used in dentistry to numb specific areas of the mouth during dental procedures.

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  • 45. 

    The technique can be used to anesthetize the palatal soft tissue of the teeth posterior to maxillary canine and corresponding alveolus and hard palate is called

    • Greater palatine nerve block

    • Naso palatine nerve block

    • PSA nerve block

    • Infraorbital nerve block

    Correct Answer
    A. Greater palatine nerve block
    Explanation
    The technique used to anesthetize the palatal soft tissue posterior to the maxillary canine and corresponding alveolus and hard palate is called a Greater palatine nerve block.

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  • 46. 

    Which techniques do not work in the adult mandible due to dense cortical bone the below technique is

    • Infiltration injection technique

    • Field block

    • Nerve block

    • Mental nerve block

    Correct Answer
    A. Infiltration injection technique
    Explanation
    The infiltration injection technique does not work in the adult mandible due to dense cortical bone. This technique involves injecting the anesthetic solution directly into the tissue surrounding the tooth or area to be numbed. However, in the adult mandible, the dense cortical bone prevents the anesthetic from diffusing effectively, making this technique ineffective.

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  • 47. 

    The area of injection mucobuccal fold between the mandible premolars is called

    • Mental Nerve Block

    • IAN Block

    • Long buccal Nerve block

    Correct Answer
    A. Mental Nerve Block
    Explanation
    The area of injection mucobuccal fold between the mandible premolars is called the Mental Nerve Block. This block is used to anesthetize the mental nerve, which supplies sensation to the lower lip and chin. By injecting an anesthetic agent into the mucobuccal fold in this area, the mental nerve can be effectively blocked, providing anesthesia to the lower anterior teeth, chin, and lip. The IAN Block refers to the Inferior Alveolar Nerve Block, which is used to anesthetize the lower teeth and surrounding structures. The Long Buccal Nerve Block is used to anesthetize the buccal gingiva and mucosa in the mandibular molar region.

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  • 48. 

    The infraorbital nerve are supply for the front teeth both side left and right of the maxillary , especially for anterior superior alveolar nerve twigs and leave the trunk just before it exit of the infraorbital foramen and outside the foramen twigs to the skin between the nostril and eye.Which area is used for injection local anesthesia for these teeth?

    • At the apex between the canine and first premolar

    • At the apex between the second premolar and first molar

    • At the apex between the second and third molar

    • At the apex between the first and second molar

    Correct Answer
    A. At the apex between the canine and first premolar
    Explanation
    The correct answer is at the apex between the canine and first premolar. The explanation for this is that the infraorbital nerve supplies the front teeth, specifically the anterior superior alveolar nerve twigs. These twigs leave the trunk of the infraorbital nerve just before it exits the infraorbital foramen. The injection of local anesthesia for these teeth is typically done at the apex (tip) of the root between the canine and first premolar.

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  • 49. 

    Biotransformation of amides take place where?

    • Liver

    • Kidney

    • Blood plasma

    • Spleen

    • Bloodstream

    Correct Answer
    A. Liver
    Explanation
    The liver is responsible for the biotransformation of amides. Biotransformation refers to the chemical modification of substances in the body, and the liver plays a crucial role in metabolizing various drugs and compounds. It contains enzymes that can break down amides into their metabolites, which can then be eliminated from the body. The kidney, blood plasma, spleen, and bloodstream do not have the same level of metabolic activity as the liver, making the liver the primary site for amide biotransformation.

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  • Sep 20, 2024
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  • Jul 02, 2020
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