NBDE Part 1 – Syllabus and Questions Distribution

NBDE part 1 is an examination to get into universities in USA for DDS. NBDE Part – I consists of a total of 400 questions which are divided as follows:

NBDE part 1 syllabus and question grading

400 questions:

  • 320 questions – 80% – General discipline based questions
  • 80 questions – 20% – Ethical based questions – representing a patient scenario

Link: What is the Cost of DDS in USA

Based on the previous years papers, each topic has been allotted a specific number of questions which have been mentioned below:

ANATOMIC SCIENCES – 100 questions

Gross Anatomy  – 49 questions

  • Head
  • Oral cavity
  • Extraoral structures
  • Osteology
  • TMJ and muscles of mastication
  • Neck
  • Axilla, shoulders, and upper extremities
  • Thoracic cavity
  • Abdominopelvic cavity
  • Central nervous system & neuroanatomy
  • Bone Muscles
  • Fascia Nerves (peripheral and autonomic)
  • Arteries, veins, and lymphatics Spaces and cavities
  • Joints and ligaments Endocrines and exocrines

Histology – 23 questions

  • Ultrastructure
  • Basic tissues
  • Bone, cartilage, and joints
  • Lymphatic and circulatory systems
  • Endocrine system
  • Respiratory system
  • Gastrointestinal system
  • Genitourinary system
  • Integument

Oral Histology – 16 questions

  • Tooth and supporting tissues
  • Soft oral tissues
  • Temporomandibular joint

Developmental Biology – 11 questions

  • Osteogenesis
  • Tooth development, eruption, and movement
  • Facial and brachial arch development
  • General embryology

Professional Ethics/Patient Management – 1 question

Bio Chemistry and Physiology – 100 Questions

Biological Compounds – 10 questions

  • Sugars and carbohydrates
  • Amino acids and proteins
  • Lipids
  • Nucleic acids and metabolism
  • Nutrients and minerals
  • Intradisciplinary and clinical/cross correlation

Metabolism – 17 questions

  • Bioenergetics
  • Enzymology
  • Catabolism
  • Anabolism
  • Urea cycle
  • Regulation
  • Intradisciplinary and clinical/cross correlation

Molecular and Cellular Biology – 9 questions

  • DNA/RNA and protein synthesis
  • Genetic engineering
  • Cell cycle
  • Intradisciplinary and clinical/cross correlation

Connective Tissues – 8 questions

  • Soft tissue
  • Hard tissue/calcification
  • Intradisciplinary and clinical/cross correlation

Membranes – 4 questions

  • Structure
  • Function
  • Intradisciplinary and clinical/cross correlation

Nervous System – 6 questions

  • General properties
  • Central nervous system
  • Autonomic nervous system
  • Somatic nervous system
  • Intradisciplinary and clinical/cross correlation

Muscle – 6 questions

  • Skeletal
  • Smooth
  • Cardiac
  • Intradisciplinary and clinical/cross correlation

Circulation – 9 questions

  • Fluid content and dynamics
  • Coagulation
  • Cardiodynamics and electrophysiology
  • Regulatory mechanisms
  • Intradisciplinary and clinical/cross correlation

Respiration – 6 questions

  • Mechanical aspects
  • Gas exchange and transport
  • Regulation
  • Intradisciplinary and clinical/cross correlation

Renal – 8 questions

  • Functional anatomy
  • Blood flow and filtration
  • Reabsorption and secretion
  • Regulation
  • Acid-base balance
  • Intradisciplinary and clinical/cross correlation

Oral Physiology – 3 questions

  • Taste
  • Mastication (with reflexes)
  • Swallowing

Digestion  – 5 questions

  • Neuromuscular
  • Secretions
  • Absorption
  • Regulation
  • Intradisciplinary and clinical/cross correlation

Endocrines  – 8 questions

  • Pituitary/hypothalamus
  • Reproduction
  • Signaling systems
  • Pancreas/parathyroid
  • Adrenal/thyroid
  • Intradisciplinary and clinical/cross correlation

Professional Ethics/Patient Management – 1 question

Microbiology and Pathology – 100 questions

General Microbiology – 20 questions

  • Microbial biochemistry and physiology
  • Microbial cytology
  • Microbial variations and genetics
  • Sterilization and disinfection
  • Biology of microorganisms
  • Bacteria
  • Viruses
  • Fungi
  • Antibiotics and chemotherapy
  • Oral ecology and epidemiology

Reactions of Tissue to Injury  – 10 questions

  • Inflammation and repair
  • Physical and chemical injury
  • Hemodynamic disorders

Immunology and Immunopathology – 13 questions

  • Host defense mechanisms
  • Hypersensitivity
  • Immune system

Microbiology, Immunology, and Pathology of Special Infectious Diseases – 22 questions

  • Bacterial
  • Viral
  • Fungal
  • Chlamydial and rickettsial

Systemic Pathology  – 22 questions

  • Cardiovascular
  • Respiratory
  • Gastrointestinal and hepatobiliary
  • Genitourinary
  • Blood-lymphatic
  • Endocrine
  • Musculoskeletal
  • Genetic diseases
  • Nervous system

Growth Disturbances  – 12 questions

  • Non-neoplastic
  • Neoplasms–etiology, epidemiology, & biology
  • Specific neoplasms

Professional Ethics/Patient Management  – 1 question

Dental Anatomy and Occlusion  – 100 Questions

Tooth Morphology – 43 questions

  • Primary
  • Permanent
  • Incisors
  • Canines
  • Premolars
  • Molars

Pulp Cavity Morphology  – 5 questions

Calcification and Eruption  – 6 questions

Principles of Occlusion and Function  – 37 questions

  • Functional anatomy
  • Interarch (static and movement)
  • Anterior teeth
  • Posterior teeth
  • Intra-arch
  • Masticatory physiology and biomechanics
  • Temporomandibular joint
  • Muscles and ligaments
  • Determinants of occlusion

Clinical Considerations—Tooth Morphology and Anomalies – 8 questions

Professional Ethics/Patient Management – 1 question

18 Comments
  1. May 19, 2012
  2. November 7, 2012
  3. November 7, 2012
  4. November 25, 2012
  5. November 25, 2012
  6. January 26, 2013
  7. January 26, 2013
  8. August 6, 2013
  9. September 10, 2013
  10. September 15, 2013
  11. November 17, 2013
  12. July 10, 2014
  13. July 11, 2014
  14. March 3, 2016
  15. July 16, 2016
  16. September 11, 2016
  17. October 8, 2016
  18. February 20, 2017

Leave a Reply

Your email address will not be published. Required fields are marked *

buy windows 11 pro test ediyorum