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:
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
good site,very helpful
very helpful . thank you so much , but are you sure 100% about it ? is it puplished by ada ? thank you so much
It is given by NBDE in their official website
total how many que. are asked in nbde part1 exam
please can you tell the conditions for loan to study dds in us
hey varun tis is apoorva frm ur coll…thanks a lot fr the info….great work
You are most welcome Apoorva, hope it was helpful
where exam takes place india or usa?
To pursue dds..do we need to tk nly NDBE part 1?? Or do we hv to tk part 2 also?
Wich bucks do u think we shud refer fr dis exam like their d McQs n the theory part
You need to clear both, but after completing NBDE part 1 you can apply for Universities and you will be getting time for clearing Part 2 after joining university as well, but i suggest clearing both and then proceeding
hi,im monica can u tel me wat study material is required for nbde? N suggest me a tym table for preparing so dat i gt an idea. Thankyou
Nbde part 1 and 2 is for how many marks?
Hey varun ..its Aman here.. I m doing my undergrad .. I want to give DAT exam for some collges nd NDBE part 1 nd 2 for other collges ..I want to know after which year of my collge I should give dese exams nd when should I apply to d universities then?.. plz help
This link help me alot
I heard we get a break after 200 questions ?? After How much time is the break given ??
Dear varun
Can you please give the address official website of NBDE exam.. I will help me to read the sample question papers.
Can you please explain me the procedure to get license in Canada after doing BDS in India.? I have heard that there are near 5 exams which I have to clear for license without taking admission in any college..
what book do you prefer for NBDE exams.