Name two amide local anesthetics commonly used in dentistry.

• A. Lidocaine and Articaine
• B. Procaine and Benzocaine
• C. Mepivacaine and Prilocaine
• D. Bupivacaine and Ropivacaine

Answer: (A)

Local anesthetics are grouped by chemical structure into amides and esters, and this classification helps explain their behavior after injection. In dentistry, amide local anesthetics are most commonly used for injections because of their predictable metabolism and reliable duration. Lidocaine is the classic go‑to amide: it provides a dependable onset, good duration, and broad availability, making it the standard choice for many routine procedures. Articaine is also an amide, but it has a unique feature — part of its structure includes an ester-linked side chain — which makes it rapidly metabolized in plasma and gives excellent diffusion through soft tissues. That diffusion enhances effectiveness for infiltrations and some nerve blocks, so articaine is widely used in dental practice as well. Together, they represent two amide local anesthetics frequently employed in dentistry.

The other options mix in ester anesthetics that are less commonly used for injections in routine dental care, or include amides with different use patterns (longer-acting or specialty cases) that aren’t as universally favored as the standard pair.