I am a habitual lurker here and haven't gone back for several months now. I don't usually post comments because I often find that my opinion has already been expressed by another user.
I am only posting this comment to show that I'm here, too, and I'll be honest... I considered deleting all this instead of speaking up because several others have said it already.
I'd say this is plausible, but not a huge risk. A healthy individual won't have trouble either breaking it down or expelling the foreign matter when the flesh heals (like wooden splinters often do).
I'm not an expert, though, and I'd love for one to chime in on this subject!