Which injection is needed to anesthetize the palatal tissue around the left max molar?

The greater palatine nerve block is specifically designed to anesthetize the palatal tissues associated with the maxillary molars and premolars. This block targets the greater palatine nerve, which is responsible for sensation in the hard palate, particularly in the posterior regions where the molars are located. By depositing anesthetic near the greater palatine foramen, the operator can effectively numb the palatal tissue around the left maxillary molars, making this procedure comfortable for the patient.

The nasopalatine nerve block, while effective for anterior palatal anesthesia, would not suffice for the posterior maxillary molar region. The PSA (Posterior Superior Alveolar) nerve block anesthetizes the maxillary molars but does not specifically target the palatal tissue around these teeth. The buccal nerve block is focused on the buccal soft tissues and does not provide anesthesia to the palatal areas. Thus, the greater palatine nerve block is the most appropriate choice for achieving anesthesia in the palatal tissue surrounding the left max molar.