About 2 years ago, a lawsuit was filed with the United States District Court in Texas to allow dentists who were in specialties other than the nine officially recognized specialties of the American Dental Association (ADA) to advertise themselves as specialists. About a week ago, the decision was received and a summary can be obtained by clicking following link:
http://www.dentistryiq.com/articles/2016/01/united-states-district-court-ruling-sets-stage-for-expansion-of-dental-specialties-practitioner-independence-from-ada-restrictions.html?cmpid=Enl_APX_Jan-26-2016&eid=295480329&bid=1292214