you could also use 'dental posts' but the word 'dental' seems superfluous here. (Ref. 1)

I found crown post in the web (Ref. 2)
but have never heard the word before.

Having about 30 of the things in my mouth (jacket-crowns on top!) I have only heard them referred to as posts.
With new technology teeth can be rebuilt with some acrylic while sitting in the chair. Posts and all. The result is still called a crown, not a filling.

The latter dont last as long as porcellan/gold crowns.

Been there and done it both, the only posts used in dentistry are Kronenstifte.


HTH