The nerves to be anesthetized are the posterior superior alveolar nerve and its branches. The areas anesthetized are the pulps of the maxillary 1st, 2nd, 3rd molars, the buccal periodontium and the bone overlying these teeth. The landmarks are the mucobuccal fold, the maxillary tuberosity, and the zygomatic process of the maxilla. The syringe position is at a 45 degree angle inserting upward, inward and backward at the height of the mucobuccal fold over the second molar. The depth of insertion is about ½ of a long needle or 4mm should remain visible with a short needle. The bevel orientation is toward the bone.
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