Final answer:
The local anesthetic technique requiring the needle to contact the neck of the condyle is the Vazirani-Akinosi block. This technique is used to numb the lower teeth prior to dental work.
Step-by-step explanation:
The local anesthetic technique that requires the needle to contact the neck of the condyle is the Vazirani-Akinosi block. This technique is used to numb the lower teeth prior to dental work. The mandibular foramen is located on the medial side of the mandibular ramus and leads into a tunnel that runs down the length of the mandibular body. The sensory nerve and blood vessels that supply the lower teeth enter the mandibular foramen and then follow this tunnel.