Question 2 of 20

Click on the correct answer to the following question:

 After administering a left inferior alveolar nerve (IAN) block to your patient, #23 and #24 are still sensitive, even though the other teeth in the quadrant are numb. It appears these teeth have not received adequate anesthesia. What could be the cause of this:

  1. overlap of sensory fibers from the right side
  2. a long buccal injection is needed to anesthetize #23 and #24
  3. inadequate local anesthetic agent was administered
  4. the area of insertion of the needle was too superior
  5. the area of insertion of the needle was too inferior