Which nerve block primarily targets the mandibular incisors and canines?

The mental nerve block primarily targets the mandibular incisors and canines because it anesthetizes the mental nerve, which is a terminal branch of the inferior alveolar nerve. When performed, this block provides anesthesia to the lower lip, chin, and the facial mucosa of the mandibular anterior teeth, specifically the incisors and canines.

The mental nerve emerges from the mental foramen and supplies sensation to the area, making this block effective for procedures involving the anterior mandible where localized anesthesia is required. This block is particularly useful in restorative or surgical procedures on these teeth, as well as for managing pain in this specific region.

In contrast, the MSA nerve block is focused on the maxillary premolars and is not applicable to mandibular teeth. The PSA nerve block targets the maxillary molars and similarly does not provide anesthesia to the mandibular anterior teeth. The maxillary nerve block, on the other hand, involves broader areas of the maxilla and does not target the mandibular incisors and canines specifically. Thus, the mental nerve block is the most appropriate choice for anesthesia of the mandibular incisors and canines.