Board Thread:Questions and Answers/@comment-16680724-20190709033232/@comment-3020860-20190728174428

Well, in the context of that comic I think it's just a way of demonstrating the pirates' mentality for the reader. "They're pirates, they'd steal everything you have of value, even the gold in your teeth!" No connotations of Nazi grave-robbing or the like, at least not intentionally.

(Also, on practical terms, stealing someone's fillings doesn't really do them any harm. People lose fillings all the time. You just get a new filling. So, it may "sound" worse than it really is.)