The Western Regional Examining Board (WREB) was one of five examination agencies for dentists and dental hygienists in the United States. The other examination agencies were/are, Council of Interstate Testing Agencies, Central Regional Dental Testing Service, Northeast Regional Board of Dental Examiners (later the Commission on Dental Competency Assessments), Southern Regional Testing Agency. These were organized to better standardize clinical exams for licensure. In 2021, WREB merged with the Commission on Dental Competency Assessments. WREB examinations were no longer given after 2022.