I believe this may be the first ”known” device of its kind, however I think a string of other technologies already exist that are not publicized. One other I am aware of is an implanted tracking device put into a persons body. I also recall hearing of an assesment chip of sorts that calculates readings used in the medical field, also placed in ones body. As far as the tooth chip is concerned...can we say ”privacy red flag!” Invites others to ”come hack my tooth.”