The idea of a cell phone embedded in the teeth is not very new. By directly stimulating the auditory nerve, people would not need to wear headphones to listen and would simply need to speak, since the microphone would be inside their mouth. The number would be dialed by voice command, since the circuit would be intelligent enough to understand this... This innovation is already being tested in Japan, as a technological alternative that shows the trend of electronics becoming part of the human body itself. This is what we call bionics, that is, the application of electronics in biology and vice-versa, with an integration between the living and the technological in such a close way that we can no longer know exactly where one ends and the other begins. Going a little further, it seems that soon dentists will need to be trained in electronic technology, since more things are being announced for the implantable teeth of the future. This is the case of a company that is advertising a tooth equipped with an internal reservoir of medicines, for people who need them constantly, who do not remember to take them at the right time (or cannot) or even in emergency situations.