And as for why the dentist acted that way, he thought they'd say, "Holy shit! How did you know that?" or "No, but I had a dentist from Slovenia!" and they'd be amazed by the dentist's knowledge.

The dentist had no fallback plan if his amazing guess didn't work, and he didn't know what to do, so it became super awkward.

I was half hoping the comment would end with undertaker and mankind, but an actual explanation is cool too.

Dang, I figured he got sucked off through a glory hole in Slovenia once and recognized the tooth and gum line or somthing.....clearly I watch too much porn

Some of these dental techniques are not simply bizzare. A very common example is "Russian Red", a resin used in various contexts, e. g. for filling rooth canals that is notoriously hard to remove and toxic.

https://pubmed.ncbi.nlm.nih.gov/12877257/

https://www.nature.com/articles/s41415-021-3041-9

From the little bit I read about the techniques, I'm glad my dentist is not soviet or Slovenian

Interesting that the US dentist thinks OP’s dentist asked them if they’ve ever been to Slovenia but then mentions lots of Slovenians came to the US.

thank you

This is so weirdly cool.