What kind of local anesthesia is deposited in the small terminal nerve endings in the area of the dental treatment?

• A. Local infiltration
• B. Nerve block
• C. Field block
• D. General anesthesia

Answer: (A)

The concept being tested is how anesthesia is delivered to target a small area by working right at the nerve endings in the treatment site. Local infiltration involves depositing the anesthetic close to the terminal nerve endings in the mucosa and surrounding tissues around the tooth. This means the drug acts locally to block the nerve fibers that supply that specific area, producing anesthesia of a small region focused on the treated teeth and nearby soft tissues.

In the maxillary region, this works well because the bone is relatively porous, allowing the anesthetic to diffuse from the injection point to nearby nerve endings that innervate the tooth. This is different from a nerve block, which targets a larger nerve trunk to numb a broader zone; a field block aims to block a larger area along a nerve path but still not at the terminal endings; and general anesthesia is systemic, affecting the whole body rather than a localized area.

So, depositing anesthesia at the small terminal nerve endings in the treatment area is precisely local infiltration.