Local Anesthesia in Dental Hygiene
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Questions and Answers

What is the primary mechanism of action for modern local anesthetics?

  • Preventing both nerve impulse generation and conduction. (correct)
  • Enhancing nerve impulse conduction.
  • Increasing nerve impulse generation.
  • Stimulating blood flow around nerve cells.

    • Which of the following best describes local anesthesia?

  • Induces a temporary loss of consciousness to reduce pain.
  • Stimulates electrical activity in the brain to override pain signals.
  • Results in the loss of sensation in a specific area of the body without loss of consciousness. (correct)
  • Increases nerve impulse transmission to diminish pain perception.

    • What is the impact of the sodium pump on the environment inside a nerve cell?

  • It increases the positive charge by allowing free movement of sodium.
  • It causes no change in the environment.
  • It creates a negatively charged environment by moving sodium ions out. (correct)
  • It creates a balanced ion concentration, maintaining a neutral charge.

    • In nerve conduction physiology, what role do potassium ($K^+$) and sodium ($Na^+$) ions play?

    <p>They are equally concentrated across nerve cell membranes and involved in nerve conduction. (C)</p> Signup and view all the answers

    When is administering local anesthesia most appropriate during dental hygiene care?

    <p>For therapeutic scaling and root planing or when clients experience tooth or soft tissue sensitivity. (A)</p> Signup and view all the answers

    Flashcards

    Local Anesthesia

    Loss of sensation in a specific body area without loss of consciousness.

    Clients Requiring Local Anesthesia

    Not all patients need local anesthesia; it's used for certain dental procedures.

    Key Ions in Nerve Conduction

    Potassium (K+) and Sodium (Na+) ions are crucial for generating nerve impulses.

    Electrical Potential in Nerves

    Difference in charge inside and outside the nerve cell crucial for impulse generation.

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    Nerve Impulse Generation

    Occurs when the sodium pump creates a charge difference across the nerve membrane.

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