National Board Dental Examination NBDE

Dental Assist

National Board Dental Examination is intended to help state board  in determining  the qualifications of dentists who want to have licensure and specialization in dentistry. Dentists who are trained outside the US and plan to apply in one of the Advanced Standing programs  in the US must also take this exam. NBDE is managed by the American Dental Association  and Joint Commission on National Dental Examination.

Exam Eligibility

For Applicants trained outside the US their dental degree must be granted by accredited institutions outside the United States.


For registration please visit the official website of ADA National Dental Association

Exam Details

Part 1

Candidates may take the Part 1 of the NBDE. in their second year of Dental School Part 1 is a multiple-choice comprehensive exam broken into four areas.

Part 11 •    Part 11 is conducted over two days.
•    The first day is 7 hours with an optional lunch break.
•    The first day is broken into two 3.5 hours segments with 200 questions each.
•    The second day is 3.5  hours covering 100 case problems.

Exam Levels:

Part I

• Anatomic Sciences
• Biochemistry-Physiology
• Microbiology-Physiology
• Dental Anatomy and Occlusion

Part II

• Operative Dentistry
•  Pharmacology
• Prosthodontics
• Oral and Maxillofacial Surgery/Pain Control
• Orthodontics/Pediatric Dentistry
• Endodontics
• Oral Diagnosis (Oral Pathology, Oral Radiology
• Periodontics
• Patient Management

Exam Contents

Part 1

Duration 3 hours 30 minutes

• Anatomic Sciences - : 100 Questions
• Gross Anatomy - 50 Questions
• Oral Histology - 16 Questions
• Developmental Biology - 11 Questions
• Histology 23 Questions

Part 2 
Duration 2 days

First day 
Duration:   7 hours divided into 2 segments at 3.5 hours each

• Endodontics - 30 Questions
• Operative Dentistry - 45 Questions
• Oral and Maxillofacial Surgery/Pain Control - 43 Questions
• Oral Diagnosis 44 Questions
• Orthodontics and Pediatric Dentistry - 58 Questions
• Periodontics - 45 Questions
• Pharmacology - 34 Questions
• Prosthodontics - 45 Questions

Second Day  
Duration:   3.5 hours - 100 Questions

Patient Management including  Behavioral Science, Dental Public Health and Occupational Safety

NBDE Test Preparation & Study Tips

This is a multiple choice exam. Here are tips and information in increasing your score on multiple choice questions.

Having difficulty covering all the material? Mnemonics can help memorizing and remembering. Here's how >>>

Tips for Taking Oral Exams

Pass the NBDE with the Least Amount of Studying


Complete study guide prepared by a dedicated team of expert researchers.

You receive the benefit of our hard work! Here is a complete exam guide with everything you need, including study plan prepared by experts.

NBDE Study Guide

The NBDE is a program of the American Dental Association (ADA).
The Test Preparation web site is a service to visitors interested in the NBDE and is not affiliated in any way with the ADA.