Anesthesia · single question
How does intrapulpal anesthesia work to achieve pain control?
Show answer and explanation
Correct answer: B. Back pressure (hydraulic pressure mechanism)
B) Back pressure — CORRECT.
Intrapulpal injection works primarily through HYDRAULIC/BACK PRESSURE. When the anesthetic solution is injected under pressure directly into the pulp chamber against resistance, the pressure itself creates immediate analgesia (pressure anesthesia). The key is firm resistance during injection — without back pressure, the technique is ineffective. The chemical effect of the anesthetic is secondary.
A) Chemical diffusion: Applies to regional blocks — intrapulpal works mainly through pressure.
C) Vasoconstriction: Not the mechanism of analgesia for intrapulpal injection.
D) Corticosteroid effect: Not a component of standard local anesthetics or intrapulpal technique.
Intrapulpal injection works primarily through HYDRAULIC/BACK PRESSURE. When the anesthetic solution is injected under pressure directly into the pulp chamber against resistance, the pressure itself creates immediate analgesia (pressure anesthesia). The key is firm resistance during injection — without back pressure, the technique is ineffective. The chemical effect of the anesthetic is secondary.
A) Chemical diffusion: Applies to regional blocks — intrapulpal works mainly through pressure.
C) Vasoconstriction: Not the mechanism of analgesia for intrapulpal injection.
D) Corticosteroid effect: Not a component of standard local anesthetics or intrapulpal technique.