Ghost teeth (what Goethe called Geisterzahn) are neutral entities, neither quite divine nor satanic, equally good and bad.  "Their realm may be beyond human rationality, but it is not inaccessible to human experience.  [Ghost teeth] have their home in the imagination.  Neither concrete, i.e. empirically verifiable, nor rational, they inhabit the above and below of human rationality.  They are a concrete experience of the non-concrete in the mind, an imaginary concretisation of extra-rational phantoms" (Maike Oergel, Culture and Identity: Historicity in German Literature and Thought 1770-1815, 2006, p. 241).

We wrote a macabre tale about ghost teeth, and it appears in the Spooky Tales ebook.

From Prof. Oddfellow's sketchbook: