Having dental/medical/eye procedures done in Costa Rica is popular. Typically the doctors are US trained, facilities are good, and the cost is a fraction of US prices. This website will probably have some info, or you could post a question there.

http://discoverypress.com/

I've also heard Cuba has special hospitals for foreigners that are like country clubs, and they have state of the art care. Of course, it's a little more difficult to get to, but people do it.