It's all cheap.
My last dental checkup included x-rays, cleaning (including using ultrasonic as I hate picks), and a fluoride treatment. Cost was RD$1200. (about US$40)
In the past, I had to have a root canal, followed by a gold inlay, and the cost was equivalent to US$140 for everything.
I think that crowns run about US $150 to US $175 for gold or porcelain.
Not sure on bridges or implants, but there are lots of dentists that specialize in this type of work at similar costs.
For a lot less, you can get any of the above done in a Dominican university's dental clinic for whatever the material costs are, and a minimal clinic charge, and the student dentists are in their last year of studies, supervised by their professors.