The best way I’ve found to avoid elephant feet is to chamfer the bottom perimeter by 0.5mm.
The image above probably isn’t the best one to illustrate the point (but I had it handy as I’m writing this) but should hopefully give you an idea.
Now I know that your teeth are probably too small to take this approach literally, but there might be something you can do here with a minimal cantilever that will give you a good quality print and be somewhat insensitive for the need of the Z height offset to be nuts on perfect.