It would probably help if you called the American Dental Association in Chicago. Go to ada.org.. The main number is listed and I am sure someone in the department that handles the National Board information will direct your question to the right person. Hope this helps.
Go to http://www.prometric.com/ADA/default.htm ........ locate ur test center ... u can see different options ...but yeah there are not many countries where u can write NBDE.
