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.
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.
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.