INBDE question bank · 7-day free trial

7,332 INBDE practice questions. An explanation after each answer.

Practice questions for the Integrated National Board Dental Examination, tagged by specialty, with study modes that bring back what you missed.

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For comparison, one INBDE attempt costs $890 (JCNDE).

EndodonticsSample · 1 of 7,332

A patient presents with lingering pain to cold and pain on percussion. Which pulpal and periapical diagnosis best describes this patient?

Pick an answer to see the explanation.

INBDE practice questions
7,332
study modes
3
INBDE candidates have studied here
200

Three ways to study, each for a different week of your prep

  • Random

    Mixed selection, prefers unseen.

    A good first pass through a specialty: fresh questions come first.

  • Wrong-first

    Re-drills your past wrong answers.

    Your past misses come back before anything else, so weak spots get the most practice.

  • Unseen

    Only questions you've never seen.

    Cover the whole bank without repeats.

Study by specialty

Questions are tagged by specialty, so you can start where you are weakest, drill one area at a time or mix them all. Specialties include:

  • Pharmacology
  • Oral Pathology
  • Periodontics
  • Endodontics
  • Oral Radiology
  • Pediatric Dentistry
  • Ethics & Law
  • Operative Dentistry
  • and more.

An explanation after each answer

Answer a question and you see whether you got it right and why. If you think a question is wrong, flag it and we review it.

The INBDE at a glance

Official exam details as published by the JCNDE. Our questions are practice material, not official JCNDE items.

Who runs it
The Joint Commission on National Dental Examinations (JCNDE), an agency of the American Dental Association; administered by Prometric in the United States and Canada.
Source: INBDE 2026 Candidate Guide (PDF) (opens in a new tab) · Overview
Format
500 multiple-choice items over two days: three sections of 100 standalone items, then case-based sections of 60, 70 and 70 items. Each item has one correct or best answer.
Source: INBDE 2026 Candidate Guide (PDF) (opens in a new tab) · Administration Schedule; Sample Item Formats
Testing time
Day 1: 8 hours 15 minutes. Day 2: 4 hours 15 minutes (12 hours 30 minutes in total, including the optional tutorials, breaks and survey). Both days at the same test center, the second within 7 days of the first.
Source: INBDE 2026 Candidate Guide (PDF) (opens in a new tab) · Administration Schedule; JCNDE INBDE page (opens in a new tab)
Passing score
Results are reported as pass or fail. Behind them is a scale score from 49 to 99, with 75 as the minimum passing score; a scale score is not the number of questions answered correctly.
Source: INBDE 2026 Candidate Guide (PDF) (opens in a new tab) · Scoring
Exam fee
$890 when purchased individually (US dollars, non-refundable).
Source: INBDE 2026 Candidate Guide (PDF) (opens in a new tab) · Examination Fees
Retakes
At least 60 days between unsuccessful attempts, with at most 4 attempts in any 12-month period. Candidates must pass within five years of their first attempt or five attempts, whichever comes first; after that, one attempt every six months. A passed exam cannot be retaken unless a dental board requires it.
Source: INBDE 2026 Candidate Guide (PDF) (opens in a new tab) · Retesting Policy and Additional Eligibility Considerations

Source: JCNDE INBDE 2026 Candidate Guide. Confirm current details at jcnde.ada.org. Last verified .

What learners say

Dr. Bianca R.

Dr. Bianca R.

New York UniversityPassed
“Dental Board Tutor helped me so much while preparing for both the INBDE and ADEX, and I’m so happy to say that I passed both exams! The practice questions are excellent and really helped me understand what to expect and feel more confident going into my exams. I especially loved how clearly the ADEX requirements are explained. Everything is broken down in such a simple and easy-to-understand way, which helped me a lot during my preparation and made the whole process feel much less overwhelming. I’m truly grateful I found Dental Board Tutor and would definitely recommend it to anyone preparing for the INBDE or ADEX!”
Dr. Jhany B.

Dr. Jhany B.

BostonPassed
“A journey marked by dreams, challenges, sacrifices, and achievements. Today, this photo represents so much more than just a moment—it represents the fulfillment of a dream that once seemed so far away. 🥹🤍 I am eternally grateful to God for sustaining me, strengthening me, and allowing me to make it this far. All honor and glory belong to Him! 🙏🏼✨ I am also deeply grateful to everyone who was part of this journey, especially Dental Board Tutor, which was essential to my preparation and supported me through such an important chapter of this journey. 🩷 The dream became reality, the hard work became an achievement, and what was once a prayer is now a testimony. ✨”
Dr. Fabiola M.

Dr. Fabiola M.

MiamiPassed
“Dental Board Tutor was my most valuable resource for passing the INBDE. It offers a large number of exam-style practice questions, organized by question type, which was essential for helping me recognize the different types of questions and identify the correct answers. What makes it even more incredible is that the material is organized by subject and by the specific topics you need to know. This made studying much more focused and efficient. I highly recommend investing in this experience. In addition to the quality of the content, the price is incomparable to any other resource available.”
Dr. Nardi G.

Dr. Nardi G.

Washington DCPassed
“Dental Board Tutor was instrumental in my preparation for the INBDE and in getting my PASS on the first attempt. The site is very easy to use and customize, with thousands of questions. Totally recommended!”
I’m so glad I found Dental Board Tutor

Sareena C.

New York UniversityPassed
“I’m so glad I found Dental Board Tutor! The content is comprehensive, well-organized, and covers everything you need to prepare for dental board exams in the US. It was an incredibly helpful resource throughout my preparation, and I’m happy to say that I passed my exams on my first attempt! What I loved most is that it’s truly a one-stop platform for dental exam preparation. Having all the essential study materials and resources in one place made my preparation much more focused and convenient. I highly recommend Dental Board Tutor to anyone preparing for dental board exams in the US. It’s definitely a resource worth investing in! 🦷✨”
Dr. Surendar S

Dr. Surendar S

New York UniversityPassed
“DB Tutor helped me prepare for the INBDE in a way I could actually trust, and I passed on my next attempt after relying on it as my main study resource. The subject wise, high-yield question bank is built like a boot camp. Instead of wading through material that won’t show up on the exam, I could focus on the concepts that matter most, and the questions felt representative of the real test. What set it apart for me was the reasoning. When I chose an answer, the AI asked me to explain why I thought it was right, and it then showed me where my logic held up and where it didn’t. That habit removed a lot of the self-deception I had when studying alone. I was no longer reassured by simply getting an answer right; I had to justify it. The adaptive scheduling was equally valuable. DB Tutor tracked my strong and weak areas and adjusted my study plan around the time I had available, so I always knew what to work on next. It kept me moving toward the exam date without the anxiety of wondering whether I was spending time on the right topics. If you’re preparing for the INBDE and want a structured, honest, and efficient way to study, I’d recommend DB Tutor.”

Frequently Asked Questions

The Integrated National Board Dental Examination. It is run by the Joint Commission on National Dental Examinations (JCNDE), an agency of the American Dental Association; administered by Prometric in the United States and Canada.
500 multiple-choice items over two days: three sections of 100 standalone items, then case-based sections of 60, 70 and 70 items. Each item has one correct or best answer.
Results are reported as pass or fail. Behind them is a scale score from 49 to 99, with 75 as the minimum passing score; a scale score is not the number of questions answered correctly.
You start with a 7-day free trial with full access and no credit card. After the trial, the subscription is $29.99/mo (about $1 a day), renews monthly until you cancel, and you can cancel anytime. For comparison, the INBDE fee is $890 per attempt.
No. They are practice questions for studying, not official JCNDE items. Dental Board Tutor is not affiliated with the JCNDE or the ADA.
Yes. Florida Laws & Rules courses for dentists and dental hygienists, sold separately, and ADEX crown prep and anterior endo study guides, free with an account. One login for all of them.

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