What complication can arise from improper administration of a mandibular block?

The complication that arises from improper administration of a mandibular block can indeed lead to a hematoma. When the needle used for the mandibular block is improperly placed or if there is excessive pressure during the injection, it can puncture a blood vessel, resulting in bleeding that collects in the surrounding tissue, which is identified as a hematoma. This can cause swelling, bruising, and discomfort in the area.

In contrast, while infection, nerve damage, and allergic reactions are potential complications associated with local anesthetic techniques, hematoma specifically pertains to the vascular issue resulting from the technique's improper execution. Infection is typically a consideration following any invasive procedure, nerve damage can occur from direct trauma or injection into a nerve, and allergic reactions relate to the body’s response to the anesthetic agent itself rather than the technique of administration. Therefore, the incidence of hematoma is distinctly linked to the method of performing a mandibular block, making it the most correlated complication in this context.