當上顎第一大臼齒使用後上齒槽神經阻斷麻醉(posterior superior nerve block)仍然無法達到有效的麻醉效果時,應採下列何種步驟?
再一次阻斷麻醉後上齒槽神經
中上齒槽神經麻醉(middle superior nerve anesthesia)
前上齒槽神經麻醉(anterior superior nerve anesthesia)
腭神經浸潤麻醉(palatal nerve infiltration anesthesia)