The area of insertion for the buccal injection is:

The area of insertion for the buccal injection is:

• A. Posterior to the distobuccal cusp of the second mandibular molar
• B. Anterior to the canine
• C. Buccal mucosa near the first premolar
• D. At the premolars' apices

Answer: (A)

The main idea is where the buccal nerve lies as it supplies the lower molar region. To block this nerve, the needle is placed in the buccal mucosa just posterior and buccal to the distobuccal cusp of the second mandibular molar. This spot sits right where the buccal nerve travels along the cheek side of the mandible, allowing the anesthetic to reach and block the nerve as it gives branches to the buccal gingiva and mucosa of the molars. Placing the needle anterior to the canine, or near the first premolar, or at the premolars’ apices would miss the buccal nerve’s course and thus would not effectively anesthetize the buccal tissues of the molar region.

The main idea is where the buccal nerve lies as it supplies the lower molar region. To block this nerve, the needle is placed in the buccal mucosa just posterior and buccal to the distobuccal cusp of the second mandibular molar. This spot sits right where the buccal nerve travels along the cheek side of the mandible, allowing the anesthetic to reach and block the nerve as it gives branches to the buccal gingiva and mucosa of the molars.

Placing the needle anterior to the canine, or near the first premolar, or at the premolars’ apices would miss the buccal nerve’s course and thus would not effectively anesthetize the buccal tissues of the molar region.