The activity of topical anesthesia for the needling pain of local anesthetic injection was examined by using visual analog scale in the eight healthy volunteers. Volunteers were applied topical anesthesia (5% benzocaine) or placebo at mucobuccal region of canine. The needling pain of local anesthetic injection was assessed at mucobuccal region of canine at 1.5 minutes after applying topical anesthesia or placebo. There were no significant differences between these two groups ; one was applied topical anesthesia, the other was applied placebo. We assumed that the time allowed from application of topical anesthesia to local anesthesia to local anesthetic infiltration was not long enough to cause differences.
