Dentistry: Local Anesthetics and Their Applications

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What is the primary purpose of ring block anesthesia?

To anesthetize a circular area around the operation site (correct)

To reduce pain during injection

To provide spinal anesthesia

To numb a specific nerve

Which type of anesthesia is not typically used with cocaine?

Nerve block

Spinal anesthesia

Epidural anesthesia

All of the above (correct)

What is the primary reason for adding a topical anesthetic agent before injection?

To reduce the risk of paresthesia

To reduce the pain of injection (correct)

To reduce the risk of needle fracture

To prolong the anesthetic effect

What is the first step in managing a broken needle during injection?

Remove the broken part immediately with a hemostat if accessible (D) Signup and view all the answers

What is a common complication of dental local anesthetic blocks?

All of the above (C) Signup and view all the answers

What is the first step in treating a nerve damaged due to dental local anesthesia?

Managing the patient's pain (B) Signup and view all the answers

What may be mistaken for myocardial infarctions or cerebrovascular accidents?

Deaths caused by local anesthetics (D) Signup and view all the answers

What are common manifestations of acute anxiety in patients given local anesthetics?

Pallor, unrest, sweating, fatigue, palpitation, nausea, and fainting (D) Signup and view all the answers

What is the likely cause of most non-psychogenic systemic reactions in adult patients?

Accidental intravascular injections (B) Signup and view all the answers

What is often mistakenly attributed to local anesthetics?

Adverse effects caused by the process of injection (B) Signup and view all the answers

Why may some deaths be attributed to local anesthetics?

Because procedural stress is causally related to drug administration (D) Signup and view all the answers

What is the primary mechanism of action of local anesthetics in blocking pain sensation?

Blocking the influence of stimulation on Na+ conductance (A) Signup and view all the answers

Which of the following is an example of an ester-based local anesthetic?

Procaine (D) Signup and view all the answers

What is the primary purpose of surface anesthesia?

To reduce pain due to fissure or ulcer (A) Signup and view all the answers

Which of the following techniques of local anesthesia involves injecting local anesthetics into the skin or deep tissue?

Infiltration anesthesia (A) Signup and view all the answers

What is the effect of local anesthetics on nerve conduction?

Slowing of conduction (A) Signup and view all the answers

Which of the following is NOT a technique of local anesthesia?

General anesthesia (D) Signup and view all the answers

What is recommended to decrease local anesthesia-dependent nerve injury?

Using 2% lidocaine as standard and preventing repeated injections (B) Signup and view all the answers

Why may local anesthesia lack effect in some cases?

Due to poor technique in reaching the mandibular nerve during injection (C) Signup and view all the answers

What is the primary contribution of local anesthetics to oral health?

Improving patient acceptance of dental treatment (A) Signup and view all the answers

Why is local anesthesia often safer in dentistry than in medicine?

Because dosages used in dentistry are often less than in medicine (B) Signup and view all the answers

What is the estimated mortality rate associated with local anesthetic administrations?

1 death in 1.4 million administrations (C) Signup and view all the answers

What is the purpose of using local anesthetics in dentistry?

To control pain during dental procedures (B) Signup and view all the answers