More study resources

About this exam

The National Board Dental Hygiene Examination (NBDHE) is the written licensure examination that dental hygiene graduates typically sit before applying for state or regional licensure in the United States. It is developed and administered through the American Dental Association's Joint Commission on National Dental Examinations (JCNDE), which also oversees the dental (INBDE) and other national board examinations. The exam is designed to assess the candidate's grasp of the biomedical, dental, and dental hygiene sciences together with the clinical judgment needed to deliver safe, entry-level dental hygiene care, and it is generally described as spanning three broad areas: the scientific basis for dental hygiene practice, provision of clinical dental hygiene services, and community health and research principles. Preparation is usually built around a candidate guide and blueprint that set out the content areas and item formats, combined with coursework review, practice questions, and timed practice tests. Important: at the time this page was last checked, the official ADA/JCNDE NBDHE page returned a 'Page Not Found' error, so no item count, time limit, fee, passing score, or domain weighting could be confirmed. The numeric details on this page are therefore left blank rather than estimated. Confirm every specification against the current official JCNDE candidate guide before you register or schedule.

What you'll study

Common questions

About NBDHE preparation

Who administers the NBDHE?

The examination is developed and administered by the Joint Commission on National Dental Examinations (JCNDE), a body within the American Dental Association. Candidates apply and manage their testing through the ADA's testing resources, including the DENTPIN system used to identify candidates across all national dental board examinations.

What does the exam cover?

Published blueprints generally organize content into scientific basis for dental hygiene practice, provision of clinical dental hygiene services, and community health and research principles. The specific subareas and their relative weight are set by the current JCNDE candidate guide and blueprint. We were unable to verify those weightings from the official source, so treat any percentages you see elsewhere as unconfirmed until you check the guide.

How many questions are on the exam, and how long is it?

We do not report an item count or time limit, because the official JCNDE page was unavailable when we checked and we will not publish estimated figures. Both values appear in the current NBDHE candidate guide. Verify them there before scheduling, since the testing day is planned around them.

What score do I need to pass?

The passing standard is set by the JCNDE and is reported to candidates with their score reports. We have intentionally left the passing score blank rather than estimate it, because the official specification could not be retrieved. Obtain the current figure from the JCNDE candidate guide or your score report.

What happens if I fail? Can I retake it?

Retake rules, waiting periods, and any limits on attempts are set by the JCNDE and can change. Because the official page did not load, we cannot state a current retake policy. Check the candidate guide and your score report, and confirm with your state licensing board, which may impose its own rules.

Is the exam multiple-choice?

The NBDHE is generally described as a multiple-choice examination, and the JCNDE publishes item formats and sample items in its candidate guide. Item types have been revised over time, so confirm the formats in the current guide rather than relying on older descriptions from classmates or prep courses.

How should I order my studying?

Start from the current blueprint rather than from a prep book's table of contents. Tally the content areas, then allocate review time roughly in proportion to how heavily each is weighted and how weak you are in it. Rotate between content review, applied case-style questions, and full-length timed practice sets so recall is tested under exam conditions.

What is the most common preparation mistake?

Studying from secondhand summaries. Candidates often memorize figures, domain percentages, and item counts passed down from earlier cohorts, but blueprints are revised and those numbers go stale. Build your study plan from the current JCNDE candidate guide and your program's accreditation-based curriculum, and re-verify specifications shortly before your test date.

Do I need the NBDHE to be licensed?

Most U.S. jurisdictions require a national board examination result as part of dental hygiene licensure, alongside graduation from an accredited program and any clinical or jurisprudence requirements. Exact requirements vary by state or regional testing agency, so confirm with the board you intend to apply to before you register.

Where can I find the official specifications?

The authoritative source is the current JCNDE NBDHE candidate guide and the ADA testing pages. Our own attempt to retrieve the official NBDHE page returned a 'Page Not Found' error, which is why this page carries no verified item counts, fees, or pass scores. Always confirm details at the source before paying for or scheduling an exam.