Introduction

The Integrated National Board Dental Examination (INBDE) is administered by the Joint Commission on National Dental Examinations (JCNDE), which is part of the American Dental Association (ADA). The INBDE replaced the old NBDE Part I and Part II in 2020.

The INBDE is a 500-question computer-based exam administered over 2 days:

• •Day 1: 360 questions (8 hours 15 minutes)
• •Day 2: 140 questions (4 hours 15 minutes)
• •Questions are grouped into 4 test blocks on Day 1 and 2 test blocks on Day 2

The exam is organized into 3 major domains:

1. Foundational Sciences — ~30%
2. •Anatomical sciences (gross anatomy, histology, embryology)
3. •Biochemistry and molecular biology
4. •Microbiology and immunology
5. •Pathology (general and systemic)
6. •Pharmacology
7. •Physiology

1. Clinical Sciences — ~50%
2. •Operative dentistry and prosthodontics
3. •Endodontics
4. •Periodontics
5. •Oral and maxillofacial surgery
6. •Oral medicine/pathology
7. •Orthodontics
8. •Pediatric dentistry
9. •Oral radiology
10. •Patient management (anxiety/pain control, anesthesia)
11. •Patient assessment and diagnosis

1. Health Sciences Application — ~20%
2. •Evidence-based dentistry
3. •Community oral health / public health
4. •Ethics and professional responsibility
5. •Practice management
6. •Patient communication
7. •Medical emergencies

Source: ADA/JCNDE “INBDE Guide” — ada.org/education/inbde

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Recommended Resources

• •ADA INBDE Guide — Official guide from the JCNDE with exam blueprint and sample questions (ada.org)
• •Dental Decks — Flashcard-based review covering all INBDE topics (dentaldecks.com)
• •Mosby’s Dental Dictionary — Quick reference for dental terminology
• •First Aid for the NBDE Part I & II (White/Bhussry) — Still useful for foundational and clinical review
• •Dental Board Busters (Darby) — Comprehensive review with mnemonics
• •INBDE Practice Questions (various publishers) — Look for ADA-licensed or ADA-aligned question banks
• •Kaplan NBDE Prep — Online review course with video lectures and practice questions
• •Wikipedia of Dentistry (dentistry.wiki) — Free online dental wiki organized by INBDE topics
• •Netter’s Atlas of Human Anatomy — Essential for anatomy review
• •Wheelers’ Dental Anatomy, Physiology and Occlusion — For dental anatomy and occlusion
• •Sturdevant’s Art and Science of Operative Dentistry — For operative/restorative topics
• •Newman & Carranza’s Clinical Periodontology — For periodontics
• •Pathoma or Robbins — For general pathology review
• •Sketchy Pharmacology / Sketchy Micro — Visual mnemonics for pharm and micro

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10-Week Study Plan

Phase 1: Foundational Sciences Review (Weeks 1–4)

Daily Study Time: 5–7 hours

#### Week 1: Anatomy & Histology

Gross Anatomy (Days 1–4):

• •Head and neck anatomy (most heavily tested)
• •Cranial nerves (origin, foramen, function, clinical testing)
• •Muscles of mastication (origin, insertion, innervation, action)
• •Temporomandibular joint (TMJ) anatomy and function
• •Blood supply of the head and neck (external carotid branches)
• •Lymphatic drainage of the head and neck
• •Floor of mouth, tongue, palate anatomy
• •Paranasal sinuses
• •Maxilla and mandible anatomy (alveolar process, mental foramen, etc.)
• •Spinal cord and brachial plexus basics

Histology & Embryology (Days 5–7):

• •Tooth development (initiation, proliferation, histodifferentiation, morphodifferentiation, apposition, mineralization)
• •Enamel, dentin, cementum, pulp — histological features
• •Oral mucosa types (masticatory, lining, specialized)
• •Bone histology (osteoblasts, osteoclasts, Haversian system)
• •Salivary gland histology (serous, mucous, mixed)
• •Facial development (pharyngeal arches — especially 1st and 2nd)
• •Palatal development (fusion vs. failure to fuse = cleft palate)

Daily Schedule:

• •2.5 hours: Content review (Netter’s Atlas, dental anatomy textbook)
• •1.5 hours: 40–50 practice questions (Dental Decks or question bank)
• •1 hour: Flashcard review (cranial nerves, muscles, vessels)
• •30 min: Dental anatomy diagrams/sketching

#### Week 2: Biochemistry, Physiology & Pharmacology

Biochemistry (Days 1–2):

• •Carbohydrate metabolism (glycolysis, Krebs cycle, electron transport chain)
• •Lipid metabolism
• •Protein and amino acid metabolism
• •Nucleic acid metabolism (DNA replication, transcription, translation)
• •Enzyme kinetics
• •Vitamins (especially fat-soluble: A, D, E, K)
• •Mineral metabolism (calcium, phosphorus, fluoride)

Physiology (Days 3–5):

• •Cardiovascular physiology (cardiac cycle, blood pressure regulation)
• •Respiratory physiology (gas exchange, ventilation)
• •Renal physiology (filtration, reabsorption, acid-base balance)
• •GI physiology (saliva production and composition, swallowing)
• •Endocrine physiology (hormones, feedback loops)
• •Nerve physiology (action potential, synaptic transmission)
• •Neuromuscular physiology

Pharmacology (Days 6–7):

• •Local anesthetics (mechanism of action, types: esters vs. amides, maximum doses)
• •Analgesics (NSAIDs, acetaminophen, opioids — mechanisms, side effects, dental considerations)
• •Antibiotics (penicillins, cephalosporins, clindamycin, metronidazole — spectrum, uses, allergies)
• •Anxiolytics (benzodiazepines — mechanism, reversal agent: flumazenil)
• •Antihypertensives (beta-blockers, ACE inhibitors, calcium channel blockers — dental implications)
• •Anticoagulants (warfarin, heparin, DOACs — dental management)
• •Antiepileptics (phenytoin — gingival hyperplasia)
• •Drugs affecting salivary flow (anticholinergics, antidepressants — xerostomia)
• •Emergency drugs (epinephrine, nitroglycerin, oxygen, diphenhydramine)

Daily Schedule:

• •2.5 hours: Content review (pharmacology textbook, Sketchy Pharm)
• •1.5 hours: 40–50 practice questions
• •1 hour: Pharmacology flashcards and drug tables
• •30 min: Biochemistry pathways review

#### Week 3: Microbiology, Immunology & General Pathology

Microbiology (Days 1–3):

• •Oral microbiology (S. mutans, P. gingivalis, A. actinomycetemcomitans, Candida)
• •Dental caries microbiology (etiology, cariogenic bacteria)
• •Periodontal disease microbiology
• •Common oral infections (abscess, cellulitis, pericoronitis)
• •Viral infections affecting the oral cavity (HSV, HPV, HIV, varicella)
• •Antibiotic mechanisms of action and resistance
• •Infection control and sterilization (autoclave parameters, chemical disinfectants)
• •Hepatitis (A, B, C — transmission, dental implications)
• •Tuberculosis (dental office management)
• •HIV/AIDS (oral manifestations, dental management)

Immunology (Days 4–5):

• •Innate vs. adaptive immunity
• •Antibody classes (IgA — most important in oral cavity)
• •Hypersensitivity reactions (Type I–IV)
• •Autoimmune diseases affecting the oral cavity (Sjögren’s, lupus, pemphigoid, pemphigus)
• •Transplant rejection basics
• •Vaccination principles

General Pathology (Days 6–7):

• •Cell injury, death, and adaptation
• •Inflammation (acute vs. chronic)
• •Wound healing
• •Neoplasia (benign vs. malignant characteristics)
• •Hemodynamic disorders (thrombosis, embolism, infarction)
• •Genetic disorders (autosomal dominant, recessive, X-linked)
• •Diseases of immunity

Daily Schedule:

• •2.5 hours: Content review (micro, immunology, pathology textbooks)
• •1.5 hours: 40–50 practice questions
• •1 hour: Micro flashcards (organisms, virulence factors, diseases)
• •30 min: Pathology image review

#### Week 4: Systemic Pathology & Dental Anatomy/Occlusion

Systemic Pathology (Days 1–4):

• •Cardiovascular disease (atherosclerosis, MI, endocarditis)
• •Pulmonary disease (COPD, pneumonia, lung cancer)
• •GI disease (GERD, peptic ulcer, cirrhosis, oral cancers)
• •Renal disease (nephrotic vs. nephritic syndrome, CKD)
• •Endocrine disease (diabetes — dental implications, thyroid disorders, adrenal disorders)
• •Hematologic disease (anemias, leukemia, sickle cell, thrombocytopenia)
• •Neurological disease (stroke, epilepsy, Parkinson’s)
• •Musculoskeletal disease (osteoporosis, osteoarthritis, rheumatoid arthritis)

Dental Anatomy & Occlusion (Days 5–7):

• •Tooth identification and morphology (permanent and primary dentition)
• •Numbering systems (Universal, FDI)
• •Tooth surfaces and landmarks
• •Occlusion (Angle’s classification, normal occlusion, malocclusion)
• •TMJ disorders (TMD) — signs, symptoms, treatment
• •Dental materials basics (amalgam, composites, cements, impression materials)

Daily Schedule:

• •2.5 hours: Content review
• •1.5 hours: 40–50 practice questions
• •1 hour: Dental anatomy flashcards and tooth drawings
• •30 min: Review cumulative flashcards from Weeks 1–3

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Phase 2: Clinical Sciences Review (Weeks 5–8)

Daily Study Time: 5–7 hours

#### Week 5: Operative Dentistry & Prosthodontics

Operative Dentistry (Days 1–4):

• •Caries diagnosis and risk assessment
• •Cavity preparation (G.V. Black classification)
• •Direct restorations (amalgam, composite, glass ionomer)
• •Indirect restorations (inlays, onlays, crowns)
• •Pulp protection (liners, bases, pulp capping — direct vs. indirect)
• •Bonding agents and adhesion
• •Finishing and polishing
• •Restoration failure and repair

Prosthodontics (Days 5–7):

• •Fixed prosthodontics (crowns, bridges — design, materials, preparation)
• •Removable prosthodontics (complete and partial dentures)
• •Implant prosthodontics (implant components, osseointegration)
• •Impression materials and techniques
• •Provisional restorations
• •Pontic design
• •Abutment selection

Daily Schedule:

• •2.5 hours: Content review (Sturdevant’s, prosthodontics textbook)
• •1.5 hours: 40–50 clinical practice questions
• •1 hour: Review clinical scenarios and case-based questions
• •30 min: Dental materials flashcards

#### Week 6: Endodontics & Periodontics

Endodontics (Days 1–3):

• •Pulp biology and pathology (pulpitis — reversible vs. irreversible)
• •Diagnosis (vitality testing: cold, heat, EPT, percussion, palpation)
• •Access cavity preparation
• •Working length determination
• •Root canal instrumentation and irrigation
• •Obturation techniques
• •Endodontic emergencies
• •Traumatic dental injuries (Ellis classification, luxation injuries)
• •Apexification and apexogenesis
• •Non-surgical vs. surgical endodontics
• •Post and core

Periodontics (Days 4–7):

• •Gingival anatomy and health
• •Periodontal disease classification (1999 and 2017 AAP classifications)
• •Gingivitis vs. periodontitis
• •Periodontal assessment (probing depths, attachment levels, BOP, radiographic bone loss)
• •Risk factors (smoking, diabetes, genetics)
• •Non-surgical periodontal therapy (scaling and root planing)
• •Surgical periodontal therapy (flap surgery, osseous surgery, regenerative procedures)
• •Periodontal maintenance
• •Local delivery antimicrobials
• •Peri-implant disease

Daily Schedule:

• •2.5 hours: Content review (Ingle’s Endodontics, Newman & Carranza)
• •1.5 hours: 40–50 practice questions
• •1 hour: Review classification systems and treatment protocols
• •30 min: Periodontal charting practice

#### Week 7: Oral Surgery, Oral Medicine & Radiology

Oral & Maxillofacial Surgery (Days 1–3):

• •Simple and surgical extractions
• •Impacted teeth (wisdom teeth classification — Pell-Gregory, Winter)
• •Pre-prosthetic surgery
• •Biopsy techniques
• •Oral pathology — benign and malignant lesions
• •TMJ surgery
• •Orthognathic surgery basics
• •Management of post-extraction complications (dry socket, hemorrhage, infection)
• •Medical emergencies in the dental office (anaphylaxis, syncope, cardiac arrest, hypoglycemia, seizures)
• •Antibiotic prophylaxis (AHA guidelines for endocarditis)

Oral Medicine & Oral Pathology (Days 4–5):

• •Common oral lesions (aphthous ulcers, herpes, lichen planus, leukoplakia, erythroplakia)
• •Oral cancer (risk factors, screening, TNM staging)
• •Salivary gland diseases (sialolithiasis, mucocele, Sjögren’s syndrome)
• •Oral manifestations of systemic diseases
• •Burning mouth syndrome
• •Trigeminal neuralgia
• •Oral premalignant lesions

Oral & Maxillofacial Radiology (Days 6–7):

• •Radiographic physics (X-ray production, film/digital receptors)
• •Radiation biology and protection (ALARA principle)
• •Intraoral radiographic techniques (periapical, bitewing, occlusal)
• •Extraoral radiographs (panoramic, cephalometric, CBCT)
• •Radiographic interpretation (caries, periodontal disease, periapical pathology, bone lesions)
• •Normal anatomical landmarks vs. pathology
• •CBCT applications in dentistry

Daily Schedule:

• •2.5 hours: Content review
• •1.5 hours: 40–50 practice questions
• •1 hour: Radiographic interpretation practice
• •30 min: Oral pathology image review

#### Week 8: Orthodontics, Pediatric Dentistry & Special Patients

Orthodontics (Days 1–3):

• •Growth and development of the face and dentition
• •Malocclusion classification (Angle’s Class I, II, III)
• •Cephalometric landmarks and analysis basics
• •Orthodontic appliances (fixed vs. removable)
• •Interceptive orthodontics
• •Orthodontic treatment planning
• •Orthognathic surgery coordination
• •Retention and relapse

Pediatric Dentistry (Days 4–5):

• •Child behavior management (tell-show-do, positive reinforcement, sedation options)
• •Primary vs. permanent dentition differences
• •Pulp therapy in primary teeth (pulpotomy, pulpectomy)
• •Stainless steel crowns
• •Space maintenance
• •Early childhood caries (baby bottle tooth decay)
• •Dental trauma in children
• •Fluoride therapy (systemic vs. topical)
• •Pit and fissure sealants

Special Patients & Geriatric Dentistry (Days 6–7):

• •Patients with special healthcare needs
• •Patients with intellectual/developmental disabilities
• •Geriatric dental considerations (xerostomia, root caries, denture care)
• •Patients with bleeding disorders
• •Patients with cardiovascular disease
• •Pregnant dental patients
• •Patients on bisphosphonates (ONMR — osteonecrosis of the jaw)
• •Patients requiring antibiotic prophylaxis

Daily Schedule:

• •2.5 hours: Content review
• •1.5 hours: 40–50 practice questions
• •1 hour: Review clinical decision-making scenarios
• •30 min: Cumulative flashcard review

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Phase 3: Health Sciences Application & Integration (Week 9)

Daily Study Time: 5–6 hours

#### Week 9: Public Health, Ethics, Practice Management & EBD

Days 1–2: Community Oral Health & Public Health

• •Epidemiology (incidence, prevalence, odds ratio, relative risk)
• •Dental public health programs (water fluoridation, school sealant programs)
• •Oral health surveillance
• •Health promotion and disease prevention
• •Social determinants of health
• •Access to care issues

Days 3–4: Ethics & Professional Responsibility

• •ADA Principles of Ethics and Code of Professional Conduct
• •Patient autonomy, beneficence, non-maleficence, justice, veracity
• •Informed consent (elements, exceptions)
• •Patient confidentiality (HIPAA)
• •Mandatory reporting (child abuse, elder abuse, infectious diseases)
• •Scope of practice
• •Dental licensure
• •Ethics of advertising
• •Record-keeping requirements

Days 5–6: Evidence-Based Dentistry & Practice Management

• •Study designs (RCT, cohort, case-control, systematic reviews, meta-analysis)
• •Levels of evidence
• •Critical appraisal of literature
• •Clinical significance vs. statistical significance
• •Practice management basics (team management, scheduling, infection control protocols)
• •Dental insurance basics (CDT codes)

Day 7: Integration Day

• •Review all health sciences application topics
• •Connect public health and ethics to clinical scenarios

Daily Schedule:

• •2 hours: Content review
• •1.5 hours: 40–50 practice questions
• •1 hour: Review ethics codes and public health principles
• •30 min: Flashcard review

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Phase 4: Practice Exams & Final Review (Weeks 10–12)

Daily Study Time: 5–6 hours

#### Week 10: Full-Length Practice Exams

• •Day 1: Take full practice exam (360 questions — Day 1 simulation)
• •Day 2: Deep-dive review of practice exam; categorize missed questions by domain
• •Day 3: Study weakest 2 domains
• •Day 4: Take practice exam (140 questions — Day 2 simulation)
• •Day 5: Review second exam; update weak-area list
• •Day 6: Targeted study of weakest areas
• •Day 7: Rest / light flashcard review only

#### Week 11: Targeted Remediation

• •Focus on your 3–4 weakest content areas identified from practice exams
• •Daily Schedule:
• •2 hours: Content review of weak areas
• •1.5 hours: 50 practice questions (targeted to weak areas)
• •1.5 hours: Review all rationales
• •1 hour: Flashcards and high-yield notes
• •End of Week: Take third full-length practice exam

#### Week 12: Final Review & Exam Days

• •Day 1: Review all missed questions from practice exams
• •Day 2: Review high-yield pharmacology, pathology, and dental materials
• •Day 3: Light review of flashcards and classification systems
• •Day 4: Rest — no heavy studying; prepare exam logistics (JCNDE ID, testing center)
• •Day 5: Light review in the morning; relax in the afternoon
• •Day 6: INBDE DAY 1 — 360 questions; stay hydrated, eat well, manage time
• •Day 7: INBDE DAY 2 — 140 questions; finish strong

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Daily Schedule Template

Total: 5–7 hours/day (take 10-min breaks every 50 minutes; longer break for lunch)

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Key Topics — High-Yield Summary

• •Pharmacology: Local anesthetics, antibiotics, NSAIDs, anticoagulants, emergency drugs, drug interactions
• •Pathology: Oral cancer, premalignant lesions, autoimmune oral diseases, common oral infections
• •Endodontics: Pulpitis diagnosis, vital vs. non-vital teeth, traumatic dental injuries
• •Periodontics: Disease classification, probing depths, treatment protocols
• •Oral Surgery: Extractions, impacted teeth, medical emergencies, antibiotic prophylaxis (AHA guidelines)
• •Radiology: CBCT interpretation, panoramic anatomy, ALARA principle
• •Dental Anatomy: Tooth morphology, occlusion, TMJ
• •Pediatric Dentistry: Behavior management, pulp therapy in primary teeth, space maintenance
• •Ethics: ADA Code of Ethics, informed consent, HIPAA, mandatory reporting

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Test-Taking Tips

1. The INBDE is integration-heavy — Questions often combine basic science with clinical application
2. Know your pharmacology — Drug side effects, interactions, and dental implications are tested constantly
3. Read the clinical vignette carefully — Extract the key details (age, medical history, medications, chief complaint)
4. Eliminate wrong answers — You can usually eliminate 2 of 4 options
5. Don’t spend too long on one question — ~1.4 minutes per question on Day 1, ~1.8 minutes on Day 2
6. Use the “mark for review” feature — Flag uncertain questions and return to them if time permits
7. Focus on the “most likely” diagnosis — Many questions present multiple plausible options
8. Know emergency protocols — Medical emergencies in the dental office are a guaranteed topic
9. Study the ADA classifications — Periodontal disease, caries risk, impacted teeth
10. Trust your preparation — If you’ve followed this plan, you’ve covered all tested domains

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Sources

• •ADA/JCNDE. “Integrated National Board Dental Examination (INBDE) Guide.” ada.org/education/inbde
• •ADA/JCNDE. “INBDE Test Specifications and Sample Questions.” ada.org
• •ADA. “Principles of Ethics and Code of Professional Conduct.” ada.org
• •AHA. “Prevention of Infective Endocarditis: Guidelines.” Circulation, 2007 (updated).
• •Sturdevant, C.M. The Art and Science of Operative Dentistry. Mosby.
• •Newman, M.G. Newman and Carranza’s Clinical Periodontology. Elsevier.
• •Ingle, J.I. Ingle’s Endodontics. People’s Medical Publishing House.
• •Netter, F.H. Atlas of Human Anatomy. Elsevier.
• •White, S.C. & Pharoah, M.J. Oral Radiology: Principles and Interpretation. Mosby.
• •Dental Decks. dentaldecks.com
• •ADA. “CDT Code Manual.” ada.org
• •Pathoma (pathoma.com) — General pathology review
• •Sketchy Medical (sketchymedical.com) — Pharmacology and microbiology mnemonics