Important Update: The JCNDE NBDHE continually updates its item bank. Candidates should focus on the latest guidelines for periodontics, radiology, and pharmacology. Always check the official NBDHE Candidate Guide for the most current protocols before your exam date. Practice with the free NBDHE practice test on PracticeTestGeeks (7 questions with answer explanations).

NBDHE Exam at a Glance

Facts verified Oct 20, 2026 against Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE. Dates that have passed are removed automatically.

Free NBDHE Test Study Tools

Interactive NBDHE Test resources on PracticeTestGeeks, free to start:

• NBDHE Test flashcards — review key terms and concepts card by card
• NBDHE Test study guide — topic-by-topic overview of what the exam covers
• NBDHE Test cheat sheet — one-page printable summary for last-minute review

Prioritize "Medical Emergencies" and "Pharmacology" in your NBDHE Prep. These sections often contain critical safety questions that are heavily weighted in the exam scoring algorithm.

1. Obtain a DENTPIN - Register for your unique dental personal identifier number on the ADA website.
2. Verify Eligibility - Ensure you are a student or graduate of a CODA-accredited dental hygiene program.
3. Submit Application - Apply for the National Board Dental Hygiene Examination NBDHE via the JCNDE portal and pay the fee.
4. Schedule Exam - Once approved, schedule your exam appointment with Pearson VUE NBDHE.
5. Prepare - Use an NBDHE Study Guide and practice tests to prepare for the big day.
6. Take the Exam - Bring valid ID to the test center and complete the 9-hour examination.
7. Receive Scores - Review your NBDHE Results 3-4 weeks later and apply for state licensure.

Plan for approximately $1,500 - $2,500 total, including the NBDHE Exam fee, regional clinical exam fees (~$1,000+), and study materials. This investment leads to a career with strong earning potential.

Ready to Pass the NBDHE?

Join thousands of dental hygiene students who have successfully passed their boards using our free resources. Start your NBDHE Prep today.

Always maintain active BLS (Basic Life Support) certification and keep records of your Continuing Education (CE) credits in case of a state board audit.

Pros and Cons at a Glance

Sample NBDHE Test Practice Questions

Try these questions from our free NBDHE Test practice tests. The correct answer and an explanation follow each question.

1. When calculating the sensitivity of a diagnostic test for periodontitis, which value represents the percentage of people WITH the disease who test positive?

   • A. True positive / (True positive + False negative) × 100
   • B. True negative / (True negative + False positive) × 100
   • C. True positive / (True positive + False positive) × 100
   • D. True negative / (True negative + False negative) × 100

   Answer: A. True positive / (True positive + False negative) × 100

   Sensitivity = TP / (TP + FN) × 100 — the proportion of diseased patients correctly identified as positive; high sensitivity minimizes false negatives.

2. A dental hygienist is critically appraising a research article about a new diagnostic test for periodontal disease. The hygienist is evaluating if the researchers were blinded to the results of the 'gold standard' diagnostic method when interpreting the new test's results. This action is primarily aimed at assessing which type of bias?

   • A. Selection bias
   • B. Performance bias
   • C. Detection bias
   • D. Attrition bias

   Answer: C. Detection bias

   Detection bias (or ascertainment bias) occurs when the assessment of outcomes is influenced by knowledge of which group a participant is in. Blinding the outcome assessors to the 'gold standard' results helps prevent their interpretation of the new test from being biased.

3. A new salivary biomarker test for early caries detection yields 80 true negatives and 20 false positives among 100 disease-free individuals. What is the specificity of this test?

   • A. 20%
   • B. 80%
   • C. 40%
   • D. 60%

   Answer: B. 80%

   Specificity = TN / (TN + FP) = 80 / (80 + 20) = 80%. Specificity measures how accurately a test identifies those WITHOUT disease (the true negative rate), thereby minimizing false positives and avoiding unnecessary treatment.

4. The Snyder colorimetric test assesses oral health by measuring:

   • A. Fluoride levels in saliva
   • B. Cariogenic bacterial acid production potential
   • C. Buffering capacity of saliva
   • D. Periodontal pocket depth

   Answer: B. Cariogenic bacterial acid production potential

   The Snyder test detects acid production by oral bacteria (primarily Lactobacillus) in a culture medium, reflecting cariogenic potential.

Take the full NBDHE Test practice test

Official Resources

• JCNDE: National Board Dental Hygiene Examination (NBDHE) - The Joint Commission on National Dental Examinations owns the NBDHE and publishes the official candidate guide, eligibility rules, fees, and scheduling steps.
• Commission on Dental Accreditation (CODA) - CODA accredits dental hygiene programs, and graduating from (or being enrolled in) a CODA-accredited program is the standard path to NBDHE eligibility.
• American Dental Hygienists' Association (ADHA) - The national professional association for dental hygienists, with resources on education, licensure, and the profession.