the teeth that can be saved — "the image of all these rows…"
the image of all these rows of teeth in the disk blots out the big dentist’s good face as he probes with a hook and says he assures her that these can be saved.
Context
The dream turns the mouth into the archive of the whole hidden history: endless reserve rows of red-tipped canines, the teeth "of a creature that carelessly tears at meat," receding down a black pipe — the self she stopped attending to shown back to her as something carnivorous she never watched. And over it, not cancelling the terror but sharing the frame with it, recovery's exact promise: that these can be saved.