NBDHE Practice Test
Updated October 2026Facts verified Oct 20, 2026 against Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE
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).
- The NBDHE consists of 350 multiple-choice items: 200 discipline-based and 150 case-based. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
- The NBDHE takes 9 hours in total, including 7 hours 30 minutes to answer questions plus the optional tutorial, breaks and survey. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
- The NBDHE minimum passing scale score is 75 on a 49–99 scale, and results are reported as pass or fail. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
- Rescheduling an NBDHE testing appointment costs $25. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
- NBDHE candidates must wait at least 60 days between unsuccessful attempts, with at most four administrations in any one-year period, and must pass within five years or five attempts of the first attempt. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
- After the JCNDE's Department of Testing Services processes an NBDHE application, the candidate is eligible to test for a six-month period. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
- The NBDHE is a computer-based exam administered by Pearson VUE test centers in the United States and Canada. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
- To take the NBDHE, eligibility must be confirmed by the dental hygiene program director, or the candidate must submit proof of graduation from an accredited program. (Joint Commission on National Dental Examinations (JCNDE), American Dental Association; delivered by Pearson VUE)
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.
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
NBDHE Practice Test Questions
Prepare for the NBDHE Test exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
NBDHE Dental Hygiene Care
NBDHE Exam Questions covering Dental Hygiene Care. Master NBDHE Test concepts for certification prep.
NBDHE Dental Hygiene MCQ
Free NBDHE Practice Test featuring Dental Hygiene MCQ. Improve your NBDHE Exam score with mock test prep.
NBDHE Dental Hygiene Trivia
NBDHE Mock Exam on Dental Hygiene Trivia. NBDHE Study Guide questions to pass on your first try.
NBDHE Infection Control and Sterilization
NBDHE Mock Exam on NBDHE Infection Control and Sterilization. NBDHE Study Guide questions to pass on your first try.
NBDHE Oral Pathology and Disease Recognition
Free NBDHE Test covering Oral Pathology and Disease Recognition. Practice and track your NBDHE exam readiness.
NBDHE Prep Flashcards
Quick review for the National Board Dental Hygiene Examination
🦠What is the primary cause of periodontal disease?
Bacterial plaque biofilm accumulation
START NBDHE PRACTICE TEST💊Which medication causes gingival enlargement?
Phenytoin (Dilantin), Cyclosporine, Nifedipine
START NBDHE MCQ QUIZ🦷What is the critical pH for enamel demineralization?
pH 4.5 to 5.5
START NBDHE TRIVIA QUIZ🦴Which radiograph best evaluates bone levels?
Vertical Bitewing radiograph
START NBDHE PRACTICE TEST📋ASA Classification for a patient with controlled hypertension?
ASA II
START NBDHE TRIVIA QUIZ🧂Optimal fluoride concentration in water?
0.7 ppm (parts per million)
START NBDHE PRACTICE TESTNBDHE Exam Study Guide
Our comprehensive NBDHE Study Guide breaks down the complex requirements of the exam. From registration details to the specific NBDHE Pass Rate statistics, this guide answers your most pressing questions about the National Board Dental Hygiene Examination NBDHE.
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.
NBDHE Score Calculator
Total Scored Questions
300
210 out of 300 correct
70%
Required to Pass: ~70% (Estimated)
NBDHE Registration Process
Year
1-2Education Accredited Program
Pre
-Exam DENTPINRegister ID
- Obtain a DENTPIN - Register for your unique dental personal identifier number on the ADA website.
- Verify Eligibility - Ensure you are a student or graduate of a CODA-accredited dental hygiene program.
- Submit Application - Apply for the National Board Dental Hygiene Examination NBDHE via the JCNDE portal and pay the fee.
- Schedule Exam - Once approved, schedule your exam appointment with Pearson VUE NBDHE.
- Prepare - Use an NBDHE Study Guide and practice tests to prepare for the big day.
- Take the Exam - Bring valid ID to the test center and complete the 9-hour examination.
- 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.
NBDHE Career Opportunities
Passing the NBDHE opens doors to diverse specialties in dental hygiene.
Pediatric Hygienist
Specializes in treating children and adolescents, requiring patience and knowledge of primary dentition.
Public
Health RDHWorks in community clinics or schools to provide care to underserved populations and promote oral health education.
Dental Hygiene Educator
Teaches future hygienists in academic settings, typically requiring a master's degree in addition to the NBDHE.
Research Hygienist
Conducts studies on new products, therapies, and disease trends for universities or oral care companies.
NBDHE Test Day Checklist
- ✓Two forms of valid ID
- ✓DENTPIN confirmation
- ✓Arrive 30 mins early
- ✓Review exam center rules
- ✓Leave electronics in locker
- ✓Bring lunch/snacks (9 hours)
- ✓Dress in layers (AC)
- ✓Positive mindset!
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.
NBDHE Renewal Requirements
Renewal Cycle Every
2 Years
CE Credits
20-30 Hours
Always maintain active BLS (Basic Life Support) certification and keep records of your Continuing Education (CE) credits in case of a state board audit.
- +Validates your knowledge and skills objectively
- +Increases job market competitiveness
- +Provides structured learning goals
- +Networking opportunities with other certified professionals
- −Study materials can be expensive
- −Exam anxiety can affect performance
- −Requires dedicated preparation time
- −Retake fees apply if you don't pass
Pros and Cons at a Glance
| Pros | Cons |
|---|---|
| Validates your knowledge and skills objectively | Study materials can be expensive |
| Increases job market competitiveness | Exam anxiety can affect performance |
| Provides structured learning goals | Requires dedicated preparation time |
| Networking opportunities with other certified professionals | Retake fees apply if you don't pass |
Sample NBDHE Test Practice Questions
Try these questions from our free NBDHE Test practice tests. The correct answer and an explanation follow each question.
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.
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.
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.
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
NBDHE Questions and Answers
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.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- jcnde.ada.org — Test delivery, eligibility, fees, exam format, passing score, retake fee, score release, time limit, score validity, exam information · verified Oct 2026