Format and Content
The Written Examination consists of two 150 minutes sessions administered in the morning and afternoon of one day. The Examination contains 300 single answer multiple-choice style questions.
The NDEB updates examination questions on a regular basis as new knowledge becomes available.
Examinations administered in 2021 will use the 2018 American Academy of Periodontology (AAP) disease classification. The 1999 AAP old term may be included in brackets after the new term when applicable.
Example: supracrestal tissue attachment (biologic width).
The Protocol contains important information regarding the Written Examination including the examination blueprint. This document should be read carefully.
Download the 2021 Written Examination Protocol in PDF format.
Score sheets are electronically scanned and processed. Results are then verified manually at least three times. An additional verification is done of all results close to the passing score before they are released to candidates.
A test equated, re-scaled score of 75 or greater is reported as a Pass. A test-equated, re-scaled score of less than 75 is reported as a Fail and will include the test-equated, re-scaled score. No further breakdown of results is available.