A molar tooth (lower left 6) extracted from the photographer, at Birmingham Dental Hospital, by being cut up into six pieces, in situ, and the jaw cut to release the roots.
The tooth is unusual for a white European person's lower molars, in having three roots, instead of two. The curvature of the roots (the three pieces to the right) prevented straightforward extraction.
<bdi><a href="https://en.wikipedia.org/wiki/en:Andy_Mabbett" class="extiw" title="w:en:Andy Mabbett"><span title="freelance consultant in digital and open content matters, Wikipedian, author, Fellow of the Royal Society of Arts">Andy Mabbett</span></a>
</bdi>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>