Here's a copy I posted in Dentist in Nogales MX
First off I would go to Los Algodones by Yuma which seems to be safer.
You can park at the casino and drive down to the border which is a short drive.
This place is pretty safe.
There are a few dentist that I would recommend.
First if you want to keep the cost down you can see
Dr. Ana Maria Gutierrex
Our son went to her.
When you go into Mexico you make the first left at the corner and go straight ahead to the other side of the block.
Make sure if you use her to only let her work on you.
I went to
Dr. Armando Hernandez Mejia
Due to needing a lot of root canal work done but he's not cheap due to being one of the best.
He is located two blocks down and make a right, then go two blocks down and he's on the corner.
I also used
Dr Pablo A. Luna
He is a bit high priced but his work is the best.
He dose a lot of stars teeth and if you want the best you need to pay a little more.
He is also located two blocks down and make a right on the left side.
He only takes cash.
You will find many different dentist there so it's your choose but at least it's a safe place to go to.