Which nerve block is primarily used for anesthesia of the lower teeth?

The inferior alveolar (IA) nerve block is specifically designed to provide anesthesia for the lower teeth, particularly the mandible. This block targets the inferior alveolar nerve as it enters the mandibular foramen, which supplies sensation to the mandibular molars and premolars on the side being anesthetized. Additionally, it typically also numbs the associated tissues, such as the lower lip and chin, making it effective for procedures involving these teeth.

In contrast, the buccal nerve block primarily anesthetizes the buccal soft tissues adjacent to the mandibular molars, but does not provide adequate anesthesia to the teeth themselves. The posterior superior alveolar (PSA) nerve block, on the other hand, is focused on the upper molars, while the lingual nerve block mainly provides sensation to the tongue and floor of the mouth. Therefore, the IA nerve block is the most appropriate choice when the goal is to achieve dental anesthesia for lower teeth.