NBDHE Dental Hygiene Board Exam Practice Test PDF (Free Printable 2026)
Pass the NBDHE Dental Hygiene Board exam with confidence. Practice questions with detailed explanations and instant feedback on every answer. 🆕
Free NBDHE Practice Test PDF Download
The National Board Dental Hygiene Examination (NBDHE) is a mandatory step toward dental hygiene licensure in the United States. This free printable PDF gives you practice questions across both Component A and Component B — the two sections that make up the full examination. Print it out, study between clinical rotations, or use it as a final review tool in the weeks before your scheduled test date. Practice with the free NBDHE practice test on PracticeTestGeeks (7 questions with answer explanations).
Passing the NBDHE demonstrates that you have the biomedical and clinical knowledge required to safely and effectively practice dental hygiene. Whether you are a final-year dental hygiene student or a candidate retaking the exam, this PDF helps you identify knowledge gaps and practice under realistic conditions. Supplement your paper-based study with our interactive NBDHE practice test for immediate feedback and detailed answer explanations.
Free NBDHE Test Study Tools
Interactive NBDHE Test resources on PracticeTestGeeks, free to start:
- Free NBDHE Dental Hygiene Care Question and Answers — 7 questions with answer explanations
- 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
- 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.
Pro Tip: Focus your NBDHE study time on areas where you score lowest. Most exam questions test application of knowledge, not memorization.
What the NBDHE Exam Covers
The NBDHE is divided into two distinct components, each testing a different dimension of dental hygiene competency.
Component A — Biomedical Sciences
This section covers the foundational science knowledge underlying dental hygiene practice. Anatomical sciences questions focus on head and neck anatomy (cranial nerves, muscles of mastication, salivary glands), dental histology, tooth morphology, and embryological development. Physiology questions address systemic processes relevant to oral health, including cardiovascular, respiratory, and endocrine function. Biochemistry and nutrition questions cover metabolic pathways, vitamins essential for oral tissues, and the role of fluoride in enamel remineralization. Microbiology and immunology content includes oral flora, pathogenic bacteria associated with periodontal disease, and the host immune response. Pathology questions test your recognition of oral lesions, systemic diseases with oral manifestations, and wound healing.
Component A — Dental Hygiene Sciences
This section tests clinical knowledge in patient assessment (medical history, vital signs, extraoral/intraoral examination), radiography (film selection, exposure techniques, image interpretation, radiation safety), and periodontics (classification of periodontal diseases, scaling and root planing principles, maintenance intervals). Pain management questions cover local anesthesia agents, vasoconstrictors, and nitrous oxide/oxygen sedation. Infection and exposure control content focuses on OSHA Bloodborne Pathogens Standard, sterilization methods, and instrument reprocessing protocols. Professional responsibility questions address ethics, patient confidentiality, and evidence-based practice principles.
Component B — Case-Based Dental Hygiene Care
Component B presents a series of patient cases, each with radiographs, a periodontal chart, and a detailed medical and dental history. Questions require you to integrate all available data to formulate a dental hygiene diagnosis, develop a treatment plan, manage patient concerns, select appropriate instruments and techniques, and make evidence-based clinical decisions. This component specifically tests your ability to apply knowledge — not just recall it — making thorough case preparation essential.
- ✓Review head and neck anatomy with emphasis on cranial nerves, major vessels, and salivary gland anatomy
- ✓Study dental histology and embryology including enamel, dentin, cementum, and pulp structure
- ✓Memorize local anesthetic agents, their maximum doses, and contraindications by medical condition
- ✓Practice reading full-mouth periapical and bitewing radiograph series for calculus, bone loss, and pathology
- ✓Review the 2017 AAP/EFP periodontal disease classification system and staging/grading criteria
- ✓Study OSHA Bloodborne Pathogens Standard requirements for infection control and instrument sterilization
- ✓Complete at least 5 full-length Component B case simulations with periodontal charting and radiograph interpretation
- ✓Review systemic diseases with oral manifestations including diabetes, HIV/AIDS, and autoimmune disorders
- ✓Study fluoride pharmacology including mechanism of action, systemic and topical delivery, and toxicity thresholds
- ✓Complete at least two full timed mock exams (Component A + Component B) to build stamina for the 7-hour test day
Free NBDHE Practice Tests Online
Our downloadable PDF is perfect for offline study, but our online platform offers features that paper cannot match. Use our full NBDHE practice test to get instant scoring, read detailed rationales for every answer, and track your performance by subject area across multiple study sessions. Online practice is especially valuable for Component B case-based questions, where seeing radiographic images and periodontal charts on screen closely mirrors your actual test-day experience.
Sample NBDHE Test Practice Questions
Try these questions from our free NBDHE Test practice tests. The correct answer and an explanation follow each question.
What does the acronym 'ADHA Standards of Clinical Dental Hygiene Practice' include as the five components of the dental hygiene process?
- A. Assessment, Dental Hygiene Diagnosis, Planning, Implementation, and Evaluation
- B. Screening, Treatment, Education, Referral, and Documentation
- C. History, Examination, Diagnosis, Treatment, and Follow-up
- D. Intake, Assessment, Intervention, Measurement, and Outcomes
Answer: A. Assessment, Dental Hygiene Diagnosis, Planning, Implementation, and Evaluation
The ADHA Standards define the five-step dental hygiene process of care: Assessment, Dental Hygiene Diagnosis, Planning, Implementation, and Evaluation — the professional framework for all dental hygiene practice.
A dental hygienist with a standard license is working in a state where the administration of local anesthesia is not within the dental hygiene scope of practice. The dentist, who is running behind schedule, directs the hygienist to administer an infiltration to the patient. What is the hygienist's most appropriate and legal course of action?
- A. Administer the anesthetic since it was directed by the dentist.
- B. Ask the patient if they consent to the hygienist administering the anesthetic.
- C. Inform the dentist that this task is outside the legal scope of practice and respectfully decline.
- D. Document the dentist's request in the patient's chart and then proceed with the injection.
Answer: C. Inform the dentist that this task is outside the legal scope of practice and respectfully decline.
A dental hygienist is legally and ethically bound to practice only within their state-defined scope of practice. Performing a task outside this scope, even under a dentist's direction, is illegal and can result in disciplinary action against the hygienist's license. The primary responsibility is to adhere to the law, protecting both the patient and one's professional license.
Which organization is responsible for developing and administering the National Board Dental Hygiene Examination (NBDHE)?
- A. American Dental Hygienists' Association (ADHA)
- B. Joint Commission on National Dental Examinations (JCNDE)
- C. American Dental Association (ADA)
- D. National Institute of Dental Research (NIDR)
Answer: B. Joint Commission on National Dental Examinations (JCNDE)
The Joint Commission on National Dental Examinations (JCNDE), an independent body sponsored by the ADA, constructs and administers the NBDHE as a standardized credentialing examination.
A dental hygienist who exceeds the scope of practice defined by their state's Dental Practice Act may face which of the following consequences?
- A. A civil lawsuit only, because scope of practice violations are not criminal matters
- B. License suspension or revocation, civil liability, and potentially criminal charges
- C. Only a written warning for a first offense with no impact on licensure
- D. Consequences borne solely by the supervising dentist, not the hygienist
Answer: B. License suspension or revocation, civil liability, and potentially criminal charges
Practicing outside the legally defined scope of practice can result in disciplinary action by the state dental board (including license suspension or revocation), civil liability for patient harm, and in some cases criminal prosecution for unauthorized practice of dentistry.
Take the full NBDHE Test practice test
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