Kid's fillings pick up radio signals, he makes contact with aliens

Question

This novel was written in kind of tongue-in-cheek IIRC.

Like I said in the question header, the protagonist has a dental filling which somehow starts acting as a radio receiver, eventually through it he learns of approaching aliens who intend to plunder Earth but "won't do anything destructive (yeah, I'm not sure how they're supposed to pull that off either)."

The aliens in question all look like fat humans with glasses (I think on the cover they all look like the same fat man with glasses} in tacky suits.

It was written in English, I recall reading it somewhen in the early-mid 80's but it could've been published before then.

Answer 1

Fat Men From Space, by Daniel Pinkwater

It doesn't mention the part about the fillings in the Goodreads description from what I saw, but it was mentioned in another review blurb I found:

Another silly story from Daniel Pinkwater, this one about a boy whose new dental filling enables to receive radio signals in his mouth, resulting in his unwitting discovery of an invasion of earth by Fat Men from Space who want all of our snack foods - especially potato pancakes. Great fun, as always.