The INBDE is a 500-item, two-day licensure examination — Day 1: three sections of 100 standalone items plus a 60-item case-based section (8 hours 15 minutes); Day 2: two 70-item case-based sections (4 hours 15 minutes) at the same Prometric center within seven days — governed by the Joint Commission on National Dental Examinations (JCNDE), reported pass or fail against a minimum passing scale score of 75 on a 49-to-99 scale, and costing $890 per attempt as the JCNDE publishes it. PassProfessor’s companion practice program is in the works, built to the examination’s integrated design.
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The program is in the works, built on the JCNDE’s published framework for this examination. Join the notify list and we will email you when enrollment opens — then use this guide to plan your preparation across both days.
The INBDE is a deliberate break from the examinations it replaced. NBDE Part I tested the sciences; Part II tested the clinic; the INBDE tests the thing itself — entry-level dental practice, presented as problems — and it is engineered so that the old preparation strategy, sciences first and clinic second, underperforms. This guide does the planning work in the open: it states the examination’s verified facts, walks the two-day architecture section by section, explains the content framework and how to study inside it, covers eligibility for both domestic and internationally educated candidates, fees, rescheduling, and retakes, explains the pass/fail scoring system, and ends with a study plan built for an integrated examination. Everything factual comes from the JCNDE’s published materials recorded in this guide’s internal sources section.
Which examination is this?
This guide covers one examination only: the Integrated National Board Dental Examination (INBDE), governed by the Joint Commission on National Dental Examinations (JCNDE), an agency of the American Dental Association, implemented by the ADA’s Department of Testing Services, and administered by Prometric in the United States and Canada. It is a high-stakes licensure examination designed to tell U.S. dental boards whether a candidate has the clinical skills to practise entry-level dentistry safely. It replaced NBDE Part I and Part II as a single integrated examination and is accepted in all U.S. states and territories as fulfilling all or part of the written examination requirement for licensure. It is not a clinical examination, and it is not the NBDHE, the JCNDE’s dental hygiene examination.
The real exam at a glance
| Fact of record | Detail |
|---|---|
| Governing body | JCNDE (an agency of the ADA); implemented by the ADA Department of Testing Services |
| Delivery | Prometric test centers, United States and Canada; same center both days; Day 2 within 7 days of Day 1 |
| Format | 500 multiple-choice items. Day 1: 3 × 100 standalone + 1 × 60 case-based (360 items, 8h15). Day 2: 2 × 70 case-based (140 items, 4h15). Total 12h30 including tutorials, breaks, and survey |
| Content framework | Domain of Dentistry: clinical content areas for entry-level general practice, underpinned by foundational knowledge areas; problem-solving tasks and patient cases throughout |
| Scoring | Pass or fail reported; underlying scale score 49 to 99, minimum passing 75; not a percentage |
| Eligibility | JCNDE application under a DENTPIN; Certification of Eligibility (dean/registrar signature) for candidates at non-CODA schools |
| Examination fee | $890 purchased individually (2026 Candidate Guide); non-refundable |
| Retakes | ≥60 days between attempts; ≤4 attempts in any 12 months; five years/five attempts rule, then once every six months |
| Results handling | Results audited before release; a results audit may be requested within 30 days of the official results document ($65 as the JCNDE lists it) |
The two-day architecture, section by section
Day 1 — 360 items, 8 hours 15 minutes. Three sections of 100 standalone items come first, then a fourth section of 60 case-based items. The day is the examination’s breadth test: standalone items range across the whole content framework in a single sitting, and the closing case section changes the cognitive gear — from item-at-a-time judgement to sustained case management — at exactly the point in the day when fatigue makes gear changes expensive. Candidates should note what the architecture implies: there is no “science day.” Foundational knowledge appears from the first section onward, in clinical dress.
The interval — up to seven days. Day 2 must be scheduled within seven days of Day 1, at the same test center. The interval is short enough that Day 1’s lessons are fresh and long enough to tempt a candidate into cramming new material. The better use of it is narrow: review the mechanics that cost time on Day 1, rest, and arrive for a morning of pure case work.
Day 2 — 140 items, 4 hours 15 minutes. Two sections of 70 case-based items, and nothing else. Day 2 is the examination’s thesis statement: given a patient, over and over, can you diagnose, plan, sequence, and manage? Every item hangs on a presentation, so reading discipline — complete extraction of the case before answering, findings tracked across the item run — decides the day.
Pacing arithmetic. Across both days, 500 items in roughly twelve and a half hours of appointment time works out to about 90 seconds per item on average, but the average lies: standalone items should run faster than that, banking time for case items that cannot responsibly be answered at standalone pace. Building that two-speed rhythm in practice — fast singles, deliberate cases — is a trainable skill and one of the highest-yield preparations available.
The content framework — and how to study inside it
The JCNDE builds the INBDE on the Domain of Dentistry: clinical content areas that describe the safe, independent general practice of dentistry at entry level, underpinned by foundational knowledge areas. Two design decisions follow, and both should shape your preparation.
First, there is no separate science examination hiding inside this one. Foundational knowledge — anatomy, physiology, biochemistry, microbiology, pathology, pharmacology, and the behavioural sciences — is tested where it is used: inside the clinical presentations it supports. A pharmacology weakness does not appear as a pharmacology section score problem; it appears as a string of missed management decisions in medically complex cases. Studying the sciences as a preliminary block, months before clinical study, therefore wastes the integration the examination is built on. The efficient order is clinical-topic-first: take a clinical area, study it properly, and pull in the foundational science at the exact points the clinical work needs it — the drug mechanism behind the prescription decision, the pathology behind the radiographic appearance, the physiology behind the medical risk assessment.
Second, the case is the unit. Clinical content is examined through problem-solving tasks — presentations that require you to use clinical skills to complete one or more tasks: establish what is wrong, decide what to do, in what order, with what risks, and what to do when the first plan meets the patient’s reality. Preparation should therefore be organized as presentations and decisions, not as topic summaries. For every clinical topic, the productive questions are the case questions: how does this present, how is it confirmed, what is the plan, what modifies the plan in a medically compromised patient, and what does the competent practitioner do when the standard plan fails?
Who can take this exam?
You apply to the JCNDE and test under a DENTPIN, the personal identification number used across the ADA’s dental examinations; a candidate who has taken another ADA dental examination may already hold one. Before scheduling, the JCNDE requires you to read the INBDE Candidate Guide, with special focus on eligibility requirements, rules of conduct, examination regulations, and test center procedures. Once the JCNDE confirms your eligibility by email, you schedule directly with Prometric — the JCNDE advises booking 60 to 90 days before your desired dates — choosing Day 1, and Day 2 within seven days after it, at the same center.
Candidates attending a dental school not accredited by the Commission on Dental Accreditation (CODA) take one additional step: a Certification of Eligibility, signed by the dean or registrar of their school, filed with the JCNDE. This is the standard route for internationally educated dentists, for whom the INBDE is typically one requirement among several on the path through an advanced standing program to U.S. licensure. Candidates in that position should map their whole route — the examination, the program, and the target jurisdiction’s remaining requirements — before booking, because the examination result is one component in a longer sequence.
A passed INBDE cannot be retaken unless a dental board requires it. Results may be audited on request within 30 days of the official results document, for the fee the JCNDE publishes ($65), with audit results available in four to six weeks.
Fees and rescheduling in full
The examination fee is $890 when the examination is purchased individually, as published in the JCNDE’s 2026 Candidate Guide, and it is non-refundable and non-transferable. Candidates educated outside CODA-accredited programs should expect an additional processing charge under the guide’s fee schedule; confirm the current amount in the guide when you apply, because published secondary figures for it disagree and the guide governs.
Rescheduling runs through Prometric, and the fee depends on notice: $50 at 30 or more business days before the test date, $70 at five to 29 business days, and $150 at one to four business days, as the JCNDE publishes the schedule. Leaving a message with the local test center does not reschedule anything — centers cannot schedule, reschedule, or cancel appointments. Failing to appear, or arriving more than 30 minutes after the scheduled start and being refused admission, forfeits the full testing fee. Emergency cancellations — sudden illness or death in the immediate family — go to the Department of Testing Services, not to Prometric.
How scoring works
The INBDE is criterion-referenced and reported in a single word: pass or fail. A passing candidate receives no score. Behind the report, performance is converted to a scale score from 49 to 99 with 75 as the minimum passing score — a conversion that keeps the standard constant across forms, and emphatically not a percentage: a candidate cannot work out, from any published information, how many items a given scale point represents, and a near miss is not “one question away” in any operational sense. Candidates who do not pass receive their scale score with performance feedback by content area, which converts a failed attempt into a map for the retake: the areas named in the feedback are where the next preparation cycle belongs. The JCNDE reviews its passing standard on a cycle — a tightened standard took effect in a recent cycle, and a further standard review is planned later in the decade — so candidates should treat the current Candidate Guide, not older cohorts’ experience, as the authority on what the examination demands.
Retakes in full
Attempts must be separated by at least 60 days, and no more than four attempts are permitted in any 12-month period. Under the five years/five attempts rule, a candidate must pass within five years of the first attempt or within five attempts, whichever boundary arrives first; beyond it, testing is limited to once every six months. Read together, these rules make the attempt a scarce resource: a candidate gets, at most, a handful of sittings inside five years, and each unsuccessful one consumes both calendar and count. The rational response is to sit the first attempt when preparation is genuinely complete — full-framework coverage, case discipline rehearsed, and timed two-day stamina demonstrated in practice — rather than to spend an early attempt on reconnaissance.
A study plan built for an integrated examination
Phase 1 — Map (week 1). Lay the content framework beside your dental school curriculum and your clinical experience. Mark the clinical areas you have treated, the ones you have only read about, and the foundational topics each one leans on. Your plan follows that map, not a review book’s chapter order.
Phase 2 — Clinical areas with science attached (weeks 2–8). Work the clinical content areas one at a time. For each: presentations, confirmation, planning, sequencing, complications, and the medically compromised variations. At each step, pull the foundational science in at the point of use — mechanisms, pathology, physiology — and make notes that bind the science to the decision it changed. This phase is the bulk of preparation and should feel like clinical study with science woven through it, never like two separate courses.
Phase 3 — Standalone speed (weeks 5–9, overlapping). Build the fast gear: timed blocks of standalone items at or under the examination’s average pace, reviewing every miss for the decision it turned on. The goal is a reliable first gear — accurate, quick, unpanicked — that leaves time in reserve.
Phase 4 — Case discipline (weeks 6–10, overlapping). Build the second gear: complete case runs under a fixed reading protocol — full presentation extracted before the first item, findings listed, plan sketched, then items in order. Work up to Day-2-shaped sittings: 140 case items in a single session, more than once.
Phase 5 — The full two-day rehearsal (final two weeks). At least once, rehearse the real architecture: a Day 1 at full length, a short interval, and a Day 2 at full length. Use the interval the way you will use the real one — mechanics review and rest, not new material. Spend the remaining days on the areas your rehearsals exposed, your identification and center logistics, and the Candidate Guide’s rules of conduct.
What makes this test demanding
Integration, scale, and compounding. Integration, because the examination abolishes the boundaries preparation habits depend on. Scale, because 500 items over two days is a test of sustained performance, and Day 2’s pure case load arrives after Day 1’s expenditure. Compounding, because case items are linked: a misread finding in a case’s stem can tax three or four items in its run, so reading discipline has a multiplier that standalone examinations never apply. The counterweights are equally specific: integrated study, a fixed case-reading protocol, two-speed pacing, and a full-length two-day rehearsal. Candidates who build those four things are preparing for the examination that exists.
How the two days connect — and how to study across them
It is tempting to treat the two days as two examinations that happen to share a name: a breadth day and a case day, prepared for separately and sat in sequence. The architecture described above does not support that reading. The case-based section that closes the first day is a bridge, not an appendix — it announces, while you are still inside the first sitting, that breadth was never the whole point. And the second day’s cases draw on exactly the breadth the first day sampled: a management decision in a case assumes the foundational knowledge, the recognition, and the judgement that standalone items test one at a time. A candidate who prepares for the days separately discovers their connection at the worst possible moment, somewhere in the first case run, when a decision requires three kinds of knowledge at once and only one of them was revised in case form.
Study across the join instead. In the overlapping middle phases of the plan, end standalone practice blocks with a short case on the same topic, and begin case sessions by naming the standalone facts the case is about to use. That small ritual — fact, then case; case, then the facts it consumed — builds the transfer the examination is designed to measure, and it exposes a diagnostic distinction worth tracking in your error records. Some misses are knowledge misses: the fact or principle was simply not there. Some are transfer misses: the knowledge was there, demonstrably, in standalone form, and did not arrive when the case called for it. The remedies differ completely. Knowledge misses send you back to the topic; transfer misses send you to more case work on topics you already know, practised under the reading protocol until retrieval inside a presentation becomes as reliable as retrieval on demand.
The interval between the days deserves the same cross-day thinking. It is part of the examination’s design, not a pause outside it, and the candidates who use it well treat it as the second half of a single performance: a brief, honest audit of mechanics — where time leaked, where reading discipline slipped — followed by rest, and no attempt to install new knowledge into a system that has to perform again within days. Material learned in the interval is learned tired, retained shallowly, and purchased with the sleep the second day’s case load will need. Protect the interval, and the second day starts with the one advantage no revision can manufacture on the morning itself: a rested reader.
Common preparation mistakes
The first mistake is the one this examination was built to punish: sequential, separated study — a science block completed and closed, followed months later by a clinical block — on an examination that has abolished the separation. If your notes keep the foundational material in a different place from the decisions it supports, your preparation is organized for the examinations that were replaced, not for this one. Rebind as you go: every clinical topic should carry its science with it, at the points of use, in the same document.
The second mistake is reading cases the way standalone items are read — quickly, hunting for the question. In a case run, the presentation is the asset and the items are claims on it; a finding skimmed or a detail dropped is taxed repeatedly, as the compounding point above explains. The fixed protocol in the plan — full extraction before the first item, findings listed, plan sketched — feels slow in the first week of practice and is decisively faster by the fourth, because it replaces re-reading under pressure with reading once, properly.
The third mistake is single-speed pacing: working every item at the same deliberate tempo and discovering, late in a section, that deliberation was spent on items that needed seconds and is no longer available for cases that needed minutes. Two-speed pacing is a rehearsed behaviour, built in timed practice blocks long before the rehearsal phase, and it includes the discipline of releasing an item — marking it, moving, returning if the section allows the time — rather than letting one hard judgement consume three easy ones.
The fourth mistake is spending an attempt. The retake rules in this guide make attempts a limited resource counted in years as well as in sittings, and that changes the ethics of entering unprepared: an early attempt taken to see what the examination is like costs calendar, count, and fee, and returns information that a full two-day rehearsal under honest conditions returns almost as completely. Sit the first attempt when the rehearsals say you are ready, and let the rehearsals — not optimism, and not a deadline chosen before preparation began — make that judgement.
Frequently asked questions
How many questions are on the INBDE? 500 multiple-choice items: 360 on Day 1 and 140 on Day 2.
How is Day 1 structured? Three sections of 100 standalone items, then one section of 60 case-based items — 8 hours and 15 minutes in total.
How is Day 2 structured? Two sections of 70 case-based items — 4 hours and 15 minutes. Day 2 is entirely case-based and must be taken within seven days of Day 1, at the same test center.
What is the passing score for the INBDE? Results are reported as pass or fail. The underlying scale score runs from 49 to 99, and 75 is the minimum passing score. It is not a percentage of items answered correctly.
How much does the INBDE cost? $890 when purchased individually, as published in the JCNDE’s 2026 Candidate Guide; non-refundable. Candidates from non-CODA programs should confirm the guide’s additional processing charge when they apply.
Who is eligible for the INBDE? Candidates who apply to the JCNDE under a DENTPIN. Candidates attending a dental school not accredited by CODA must also submit a Certification of Eligibility signed by their dean or registrar.
How often can I retake the INBDE? Attempts at least 60 days apart, no more than four in any 12-month period, and subject to the five years/five attempts rule; beyond that rule’s boundary, once every six months.
What does it cost to reschedule? Through Prometric: $50 with 30 or more business days’ notice, $70 at five to 29 business days, and $150 at one to four business days, as the JCNDE publishes the schedule. A no-show forfeits the full fee.
Does the INBDE have a separate science section? No. Foundational knowledge is integrated into the clinical content framework and tested inside clinical presentations, which is the examination’s defining design decision.
When do results come out, and can they be checked? Results are audited before release. A candidate may request an audit of results within 30 days of the date on the official results document, for the fee the JCNDE publishes ($65), with results in about four to six weeks.
Does passing the INBDE license me as a dentist? No. It fulfills the written examination requirement accepted by all U.S. jurisdictions; the licence itself is issued by the jurisdictional board when all of its requirements are met.
Are PassProfessor’s questions the real exam questions? No. They are original practice questions written to the JCNDE’s published framework. The JCNDE does not release its examination questions.
When will the PassProfessor INBDE program open? The program is in the works. Join the notify list on this page or on the program page and we will email you when enrollment opens.
Disclaimer
PassProfessor is an independent exam-preparation provider; this guide and the companion program are not endorsed by, affiliated with, or sponsored by the Joint Commission on National Dental Examinations (JCNDE), the American Dental Association (ADA), or Prometric. INBDE is a registered mark of the JCNDE. The details in this guide are drawn from the official sources recorded below and are current as of November 2026; the JCNDE’s official publications govern if anything here differs from them. Licensure decisions belong to jurisdictional boards alone.