200+ Free NBDE Part I Practice Questions
Pass your National Board Dental Examination Part I (Legacy) exam on the first try — instant access, no signup required.
Case 001: A mandibular anesthesia complication is being reviewed after a restorative appointment. Which branch of CN V3 provides primary sensory innervation to the lower lip and chin? (during initial chart review).
Key Facts: NBDE Part I Exam
July 31, 2020
Last NBDE Part I Date
JCNDE History & Timeline
Aug 1, 2020
INBDE Launch
JCNDE History & Timeline
500
Current INBDE Questions
INBDE Candidate Guide (updated 2025-12-15)
12h
Total Appointment Time
INBDE Candidate Guide (updated 2025-12-15)
$890
Current Exam Fee
INBDE Candidate Guide (updated 2025-12-15)
4
Legacy Foundational Domains
NBDE Part I-style content structure
JCNDE's official timeline states the last NBDE Part I administration was July 31, 2020, and the INBDE launched August 1, 2020. The current candidate guide (updated December 15, 2025) lists a 12-hour appointment, 500 total questions (360 Day 1 + 140 Day 2), and an $890 exam fee. Use this page as a legacy foundational-science bridge aligned to modern integrated board expectations.
Sample NBDE Part I Practice Questions
Try these sample questions to test your NBDE Part I exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.
1Case 001: A mandibular anesthesia complication is being reviewed after a restorative appointment. Which branch of CN V3 provides primary sensory innervation to the lower lip and chin? (during initial chart review).
2Case 002: A mandibular anesthesia complication is being reviewed after a restorative appointment. Which branch of CN V3 provides primary sensory innervation to the lower lip and chin? (while working through a board-style vignette).
3Case 003: A mandibular anesthesia complication is being reviewed after a restorative appointment. Which branch of CN V3 provides primary sensory innervation to the lower lip and chin? (in a timed foundational-science set).
4Case 004: A mandibular anesthesia complication is being reviewed after a restorative appointment. Which branch of CN V3 provides primary sensory innervation to the lower lip and chin? (during final exam-week consolidation).
5Case 005: A mandibular anesthesia complication is being reviewed after a restorative appointment. Which branch of CN V3 provides primary sensory innervation to the lower lip and chin? (in an integrated clinical-decision scenario).
6Case 006: A third-molar extraction consent discussion highlights lingual-side surgical risk. Which structure is most vulnerable on the lingual aspect of the mandibular third-molar area? (during initial chart review).
7Case 007: A third-molar extraction consent discussion highlights lingual-side surgical risk. Which structure is most vulnerable on the lingual aspect of the mandibular third-molar area? (while working through a board-style vignette).
8Case 008: A third-molar extraction consent discussion highlights lingual-side surgical risk. Which structure is most vulnerable on the lingual aspect of the mandibular third-molar area? (in a timed foundational-science set).
9Case 009: A third-molar extraction consent discussion highlights lingual-side surgical risk. Which structure is most vulnerable on the lingual aspect of the mandibular third-molar area? (during final exam-week consolidation).
10Case 010: A third-molar extraction consent discussion highlights lingual-side surgical risk. Which structure is most vulnerable on the lingual aspect of the mandibular third-molar area? (in an integrated clinical-decision scenario).
About the NBDE Part I Exam
NBDE Part I is a legacy exam, but its core biomedical science domains remain high-yield for modern dental board prep. This bank focuses on anatomic sciences, biochemistry/physiology, microbiology/pathology, and dental anatomy/occlusion for foundational mastery.
Questions
500 scored questions
Time Limit
12-hour total appointment (current INBDE format)
Passing Score
Legacy NBDE Part I retired; INBDE reports Pass/Fail
Exam Fee
$890 (JCNDE / ADA DTS / Pearson VUE)
NBDE Part I Exam Content Outline
Anatomic Sciences
Head and neck anatomy, neuroanatomy, embryology, and oral histology principles
Biochemistry & Physiology
Metabolism, acid-base regulation, endocrine control, and systems physiology
Microbiology & Pathology
Oral pathogens, host response, inflammation, neoplasia, and lesion triage
Dental Anatomy & Occlusion
Tooth morphology, eruption, occlusal relationships, and prosthodontic occlusal concepts
How to Pass the NBDE Part I Exam
What You Need to Know
- Passing score: Legacy NBDE Part I retired; INBDE reports Pass/Fail
- Exam length: 500 questions
- Time limit: 12-hour total appointment (current INBDE format)
- Exam fee: $890
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
NBDE Part I Study Tips from Top Performers
Frequently Asked Questions
Is NBDE Part I still administered in 2026?
No. JCNDE's official timeline states the final NBDE Part I administration date was July 31, 2020.
What replaced NBDE Part I and NBDE Part II?
The Integrated National Board Dental Examination (INBDE) replaced NBDE Part I and Part II, with implementation on August 1, 2020.
What is the current written dental board format?
The current candidate guide (updated December 15, 2025) lists the INBDE as a 12-hour appointment with 500 total questions: 360 on Day 1 and 140 on Day 2.
What is the 2026 exam fee?
The INBDE candidate guide lists an exam fee of $890.
Why study NBDE Part I topics if the exam is retired?
Because the same foundational sciences still underpin modern integrated board reasoning. Strong anatomy, physiology, pathology, and occlusion fundamentals improve clinical item performance.
How should I use this question bank?
Use mixed timed sets, review rationales deeply, and rotate weak domains every 48-72 hours. Prioritize mechanism-level understanding rather than memorizing isolated facts.