Final answer:
The Mandibular nerve block is delivered in the pterygomandibular fossa, a location that allows the dental anesthetic to numb the sensory nerve supplying the lower teeth.
Step-by-step explanation:
The Mandibular nerve block is delivered in the pterygomandibular fossa. This site is chosen for administering anesthesia because it is a point prior to where the sensory nerve that supplies the lower teeth enters the mandibular foramen. The injection is aimed at numbing this nerve by depositing the anesthetic near the foramen but not directly inside it to ensure the entire lower jaw on the side of the injection becomes numb. The lateral wall of the oral cavity is given this injection, easing dental procedures on the lower teeth.