Has anyone else had a problem with novacain? I have always needed much more novacain than the average person. During my last root canal, my dentist numbed me up . . . or so he thought . . . then waited awhile for the novacain to take effect. He returned, only to find the area he supposedly numbed up was not the least bit numb. He finally concluded that my nerves were not located where they normally should be located. He ended up going directly through the tooth. He's always telling me I'm a high maintenance patient . . . altho, I think I'm better than the average bear that sits in the corner (I'm really dating myself . . . if you know where that saying comes from, I'm dating you, too. LOL.) Anyone else had problems like this?