Where is the insertion point for the long buccal injection?

The long buccal injection is specifically designed to anesthetize the buccal nerve, which innervates the buccal soft tissues of the posterior mandibular region. The optimal insertion point for this injection is found distal and lateral to the disto-buccal cusp of the mandibular second molar. This location allows for effective access to the nerve while minimizing the risk of inadvertently injuring adjacent structures.

In this position, the needle can be advanced toward the buccal nerve in a manner that enhances the likelihood of successful anesthesia of the targeted area, which includes the buccal mucosa and gingiva associated with the mandibular molars. This technique is crucial for dental procedures in the posterior quadrant, improving patient comfort and procedural efficacy.

The other choices do not provide the correct anatomical landmark for the long buccal injection. Being distal to the first molar would not effectively reach the nerve, and the mesial position relative to the second molar may not allow for proper anesthetic delivery. Similarly, inserting the needle over the retromolar pad could lead to ineffective anesthesia since this region is not directly associated with the target nerve for this particular injection. Hence, the choice of distal and lateral to the disto-bucc