My implant crowns have holes between them and the teeth next to them
that are big enough that food gets trapped in them, and a special
brush with one narrow brush at the end is required to insert into that
hole or space to remove food.

This is very annoying.

I talked to a friend of mine who has 2 implants and he says his do not
have this hole and he does not have to use this brush to constantly
(after every meal) remove food.

My question is, why do mine have these holes between them and his do
not? Are there some types of implant crowns or implants that are
better than others in this regard? Or were my crowns made improperly?

It seems to me that my crowns were made so that these holes would be
there, intentionally? Why? Why weren't they made wider at the bottom
so that there would not be these relatively large holes there that
trap food?

I am very disappointed with my implant crowns. I told the dentist who
did them, and she and the senior dentist there say that there is
nothing wrong, that's just the way implants are. If this is the case,
then why do my friend's implant crowns not have this same design or
problem?

To me, as a layman, not understanding the dynamics, perhaps, I don't
see any reason why I should have these holes between my crowns, that
require this brush to clean out annoying trapped food every time I
eat, when my friend's implants do not have this "feature".