Paul, I've tried anisotropic in the alternate specular, but couldn't really control it well. For one thing, it didn't react to bumps. So I went back to the regular specular, but of course, I can always increase the highlight size. I've actually plugged (1-texturemap) into the ambient because the texture tends to be darker towards the edges of the teeth. I could try and boost up the intensity a little. The teeth bump here is just an fBM node. I'm sure I could to better, but where would I start looking for a good tooth bump?

-- I'm not mad at you, just Westphalian.