A few threads that might be useful. I've had minor work done and had my son's wisdom teeth pulled at Bangkok International Dental Center. I've also had probably five friends go there, some for more extensive work, and all were pleased.
http://www.bangkokdentalcenter.com/
http://www.flyertalk.com/forum/trave...vacations.html
http://www.flyertalk.com/forum/thail...-implants.html