I am interested and have some dental UV cure resin… but my hunch is this - the magnet in the tragus makes sound because it is able to easily move and cause movement in the surrounding tissue which is through friction… meaning the tissue is not tied to the magnet and does not necessarily contribute directly to its inertia. Put another way, gluing a magnet to a tooth does not allow the magnet to move at all unless it’s also moving the tooth. The tooth + magnet together create a huge amount of inertia which must be overcome to generate movement… it would be like if your cochlea would be glued to your skull… it kinda needs to float freely to vibrate properly… so maybe a magnet encased in a low durometer silicone elastomer that one side was then glued to your tooth … something like that might work. But… who knows… maybe a magnet just literally glued to a tooth could also work… hard to say without testing. My hunch though is the best approach would probably be to put a magnet inside of a titanium casing with only a thin airless vacuum space… so like 0.05mm between magnet surface and titanium shell… enough room for the magnet itself to vibrate and bang against the titanium shell with greater force (due to momentum) than the field itself could affect on the tooth alone if glued directly to it.
Actually… shit… there are dental implant base mounts (screw into the jawbone directly) that have magnets on the ends. I have some in my desk for a project I worked on a couple years ago. They are used for dentures usually so the dentures or large bridges with many teeth can “click” into place and be easily removed… it would be interesting to find someone with these and toss a loop coil around their neck and see if they hear anything.