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U.S. Dental Licensure Exam

Conquer the INBDE500 questions. Two days. It's an endurance test.

230+ Hours Study Material
15,000+ Questions
Patient Box Cases
Custom Mocks
AI Tutor

The INBDE Two-Day Marathon

Most candidates prepare for content. Almost nobody prepares for what it feels like to come back on Day 2.

Day 1

The 8-Hour Grind

Section 1Standalone
100 Q
105 min
Section 2Standalone
100 Q
105 min
Section 3Standalone
100 Q
105 min
Section 4Case-based
60 Q
105 min
360 Questions
8 hours 15 minutes total

Day 2

The Case-Based Gauntlet

Section 1Case-based
70 Q
105 min
Section 2Case-based
70 Q
105 min
140 Questions
4 hours 15 minutes total

All Day 2 questions are case-based - requires sustained clinical reasoning after Day 1 fatigue.

~95%
Pass rate for CODA-accredited students
61-75%
Pass rate for internationally trained dentists

Source: 2024 JCNDE Annual Report. In 2024, the JCNDE implemented a new, more rigorous performance standard, increasing failure rates across all candidate groups.

Why Most Candidates Struggle

Content gets you to the starting line. Endurance gets you across the finish.

The Problems

1

Stuck With No One to Ask

You don't understand a concept. No study group. No tutor on call. You re-read the same paragraph hoping it clicks.

2

The Day 2 Gut Punch

After 8 hours and 360 questions, you walk out depleted—and have to come back tomorrow. Most candidates prepare for content, not for the psychological toll of Day 2.

3

Nobody Trains for Endurance

12+ hours of testing. Research shows performance drops by 0.9% per hour—but a 20-minute break can recover it. If you haven't practiced long sessions, you won't pace correctly.

4

Day 2 is ALL Case-Based

140 questions requiring sustained reading, clinical synthesis, and reasoning—when you're already depleted. If you show up exhausted, those cases will feel twice as hard.

The QuizOdontist Advantage

1

230+ Hours of Study Material

Deep-dive lessons spanning every INBDE content area. Each topic breaks down into a concise read, practice quiz, and flashcard deck—built for the volume this exam demands.

2

Agentic AI Tutor

First-of-its-kind AI that teaches with images—the way clinical reasoning should be taught. Ask follow-ups, get visual explanations, 24/7.

3

Custom Mock Builder

Simulate Day 1 (standalone-heavy) or Day 2 (all case-based). Set difficulty, choose subjects, build the exact practice you need for each day's unique challenge.

4

Endurance Analytics

See exactly when your performance dips during long sessions. Build stamina progressively with 100 → 200 → 360 question sessions. Know your limits before exam day.

5

500+ Patient Box Cases

Realistic case-based scenarios with clinical findings, radiographs, and multi-question patient boxes. Master the format that dominates Day 2.

For International Dentists

Your Path to U.S. Licensure

The INBDE is your gateway to advanced standing programs at U.S. dental schools. While the pass rate for internationally trained dentists is lower than for domestic students, comprehensive preparation levels the playing field.

Accepted by All U.S. States

All U.S. licensing jurisdictions accept the INBDE

Year-Round Testing

Available at Prometric centers across the U.S. and Canada

No Attempt Limit

Unlike the NDEB AFK (3 attempts max), you can retake the INBDE

Important Note

The INBDE is for U.S. licensure only. If you want to practice in Canada, you need the NDEB Equivalency Process (AFK, ACJ, NDECC, Virtual OSCE). The INBDE does not count toward Canadian licensure.

Experience INBDE-Style Questions

500 questions across 2 days. Try these to see what you'll face—biostatistics and Patient Box cases.

Biostatistics
Question 1 of 3

A university dental clinic evaluated a fluorescence screening device for OSCC on 200 high-risk patients. A 15-year longitudinal follow-up tracked patient outcomes.

OSCC Screening vs. Gold Standard Biopsy

Disease +Biopsy PositiveDisease -Biopsy NegativeTotal
Test +Screening Positive40TP20FP60
Test -Screening Negative10FN130TN140
Total50150200
Correct (TP, TN)
Errors (FP, FN)

A follow-up study shows screened patients survive 10 years post-diagnosis while symptomatically diagnosed patients survive 5 years. However, the age at death is identical (65 years) for both groups. Which bias explains this apparent increase in survival time?

A
Length time bias
B
Selection bias
C
Lead time bias
D
Measurement bias

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  • 5 Lessons per Subject
  • 5 Practice Quizzes
  • 3 AI Tutor credits/month
  • Real-time Detailed Feedback

Premium

Full Access
$399CAD

3 months of full access— $133/mo· Save 11%

  • 230+ Hours of Study Material
  • Unlimited Subject Specific Quizzes
  • 30 AI Tutor credits/month
  • Unlimited Reattempts
  • Unlimited Custom Mock Builder
  • Performance Tracking & Analytics

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Frequently Asked Questions

Common questions about the INBDE exam and QuizOdontist

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