Yet another dream: Tooth and gum.

I dreamed last night that I was brushing my teeth in that careful way that dentists recommend, in gentle circles on each tooth instead of a rough back-and-forth, but in going through one circle and brushing up against the gum on one tooth on the top right side of my mouth, I peeled part of the gum back from the tooth, as I saw looking into the mirror while I brushed.