Revisiting the National Board Dental Examination

The National Board Dental Examination (NBDE) assists state boards of dentistry in determining the qualifications of dentists for initial licensure. This article explains the purpose and rationale for the policies and procedures that guide the NBDE. These examinations have been used for a number of purposes well beyond the assessment of the knowledge and abilities for entry-level dental practice. The article explores the uses and misuses of the National Boards and the relationship between dental licensure examinations and dental curricula. For National Board examinations to remain current and relevant, they must be consistent with standards and best practices for high-stakes testing, and they must focus on competencies and critical thinking skills essential for future practice. The National Board examinations have the potential to stimulate and support curricular reform through collaborative efforts of educators and practitioners who support the test development and standard-setting processes of the examinations.

Bone sialoprotein is localized to the root surface during cementogenesis

Bone sialoprotein (BSP), an RGD-containing protein with cell attachment properties, is believed to play a regulatory role in the biomineralization of various connective tissues. To determine its possible role in tooth root formation, murine dentoalveolar tissues at sequential phases of development were analyzed immunohistochemically for the presence of BSP. BSP was localized to alveolar bone and cementum at time points associated with initial mineralization of these tissues. In addition, northern blot analyses of dental follicle tissue at day 27 of tooth development indicated that BSP mRNA is expressed by dental follicle cells at a time point coincident with the initiation of cementogenesis on the peripheral tooth root surface. Collectively, these findings indicate that BSP may play an important role in the formation and mineralization of cementum.