For dental work, or any other medical procedure, I would be extremely concerned about sterility. In Mexico, disposable items are re-used repeatedly, often without suitable sterilization. You pay your money and take your chances.

Keep in mind that you can be arrested for transporting prescription, especially schedule items, across the border. It ain't legal!

I lived in Mexico three years and enjoyed nearly every minute of it. I looked very carefully at the dentist and endodontist that treated me.

Regards

Jeff