imageO.K. writes in an email:

Hello Dan.

I know you don’t see teeth on the Shroud image -but maybe this will change your view.

And he attached a PDF file with several images.  In it he writes:

Discussion: Of course one can be very careful when assessing so vague images. Although they are not clear as there are several background impurities, which make discerning most individual teeth impossible, yet it is possible to localize 4-5 of them along with some breaks between them. Adding a fact that they are in the proper place, I am now 99 % convinced that those are indeed teeth (and not for example a band of darker yarn).

Sorry. I remain 99% unconvinced.  What say you all?