Which local anesthetic provides pulpal anesthesia for at least 90 minutes and is used for management of postoperative pain?

Which local anesthetic provides pulpal anesthesia for at least 90 minutes and is used for management of postoperative pain?

• A. Prilocaine
• B. Articaine
• C. Bupivacaine
• D. Lidocaine

Answer: (C)

For extended pulpal anesthesia and postoperative pain control, you want a local anesthetic that lasts longer than the usual 60 minutes. Bupivacaine fits this need because, with vasoconstrictor, its pulpal anesthesia commonly extends beyond 90 minutes and can provide analgesia for several hours after the procedure. This longer duration is due to its chemical properties—high lipid solubility and strong protein binding—which slow its diffusion away from the injection site and prolong its effect. The added vasoconstrictor also reduces systemic absorption, further extending the block. In contrast, prilocaine, articaine, and lidocaine typically produce about 60 minutes of pulpal anesthesia, which doesn’t meet the 90-minute threshold and offers less postoperative analgesia. So for scenarios requiring at least 90 minutes of numbness and ongoing pain relief after the procedure, bupivacaine is the best choice.

For extended pulpal anesthesia and postoperative pain control, you want a local anesthetic that lasts longer than the usual 60 minutes. Bupivacaine fits this need because, with vasoconstrictor, its pulpal anesthesia commonly extends beyond 90 minutes and can provide analgesia for several hours after the procedure. This longer duration is due to its chemical properties—high lipid solubility and strong protein binding—which slow its diffusion away from the injection site and prolong its effect. The added vasoconstrictor also reduces systemic absorption, further extending the block.

In contrast, prilocaine, articaine, and lidocaine typically produce about 60 minutes of pulpal anesthesia, which doesn’t meet the 90-minute threshold and offers less postoperative analgesia. So for scenarios requiring at least 90 minutes of numbness and ongoing pain relief after the procedure, bupivacaine is the best choice.