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You can access official preparation resources and sample questions through the Joint Commission on National Dental Examinations.

Official Exam Structure

Total Questions: 350 multiple-choice questions. Time Limit: 7.5 hours total, split into two sessions. Session One (200 items): Focuses on the scientific basis for dental hygiene, clinical services, and community health/research principles. Session Two (150 items): Consists of patient cases (testlets) evaluating problem-solving and clinical application.

Popular Practice Test Options

Mometrix Academy: Offers a Free NBDHE Practice Test with a breakdown of discipline and case-based content. Pearson VUE / JCNDE: Provides authorized JCNDE Practice Test modules that report raw scores and category performance (for personal study use). Third-Party Prep Platforms: Comprehensive test-prep options like Peterson's NBDHE Prep or CrackNBDHE provide multi-test packages, diagnostics, and performance analytics.

High-Yield Topics to Review

Anatomy & Physiology: Local anesthesia innervations, head/muscle anatomy, and tooth morphology. Pathology & Pharmacology: Lesion identification, systemic conditions, emergency drugs, and local anesthetic safety limits. Periodontology & Clinical Care: Instrument angulation (e.g., 70–80 degrees for scaling), classification of periodontal disease, and preventive strategies.