While the dentist has almost no volume, it plays a very important role in the "Heck" series. The dentist is the only one to have its own gravity, keeping the entire chain stable.
Not only does the dentist have gravity, it also has a magnetic pull to it because tetracontatrimillinonoctpentium, when combined with oxygen, make a metal. Oxygen is often found outside the dentist, so it has a magnetic pull.
While the dentist plays an important role, it is very hard to see because it would look like a spec of dust to, say, Dave. For this reason, the dentist is very protected with negative-dimensional objects.