Belgians implant tooth with rfid for ID-ing the dead -- March 2006

"In the case of humans, however, the intention of the ID tag is to allow forensic teams to retrieve a person's name, nationality, date of birth and gender allowing identification after, say, a natural disaster.

Experiments show that the tags withstand temperature changes of up to 450 °C - so they're pretty well vindaloo-proof [ Ed: won't turn to a paste ] - but repeated expansion and contraction of the tooth is still a problem, requiring the use of an insulating layer.
http://www.theregister.co.uk/2006/03/20/rfid_in_tooth/