As I understand it, that is exactly what happens. The body then
re-builds the urethra. But I cannot tell you whether that is
scar tissue or simply a replacement job. I suspect the latter.
An interesting question.

Logically, scar tissue will be formed where it is needed to
protect under-lying tissues or organs but I suspect the urethra
is one area that is designed to "wear" (like the teeth of
rodents which continue to grow as the tips are worn down!). Does
that make sense? Just a guess.

Derry

I was told by a Doctor who does PVPs that in time the sides of the canal
heal and become smooth urethral tissue. Most of the tissue within the
prostate is removed and the glad does collapse, but this is expected.

This question has puzzled me too. That is, why destroy the urethra in
the process? Why not work around the urethra to eliminate the unwanted
tissue? It was explained to me by Dr. Te's research assistant that the
tissue and the urethra are the same thing--there is no separate "canal"
as such. Thus in removing the unwanted tissue, a larger passage is
created, relieving the symptoms. Worked for me. Hope this helps answer
your question.

Dick