Shemot 13:9 says:
למען תהיה תורח ה בפיך
So that G-d's Torah should be in your mouth.
So, my teeth are in my mouth together with the Torah, and they absorbed some of the Torah, too. So, I guess they are now considered "holy". If they are extracted from my mouth, and they have Torah on them, don't I have to bury them properly?