There are four documents from the NDEB that most AFK candidates never use properly, and one scoring fact that most of them misunderstand in a way that distorts their entire preparation. The examining board publishes a free web-based self-assessment, a released question bank, a reference text list, and a statement of the knowledge, skills and abilities required of a beginning dental practitioner in Canada. Together these tell you the format, the standard, the sources and the target. They are free, and they are finite, which means using them carelessly destroys them.
Key takeaways
- The AFK reports a test-equated, rescaled score, so there is no fixed percentage to aim for.
- A failing result comes with the score and no breakdown, so your own error log is your only feedback.
- The official released questions and self-assessment are your best calibration, and they are non-renewable.
- Use the NDEB's statement of required knowledge and abilities as your syllabus, not a commercial one.
- The two-part structure means a four-hour day, and the interval between parts is a variable you control.
Equated scoring, and why your practice percentage lies
Start with the scoring, because misunderstanding it distorts everything else.
The AFK uses a test-equating procedure, and it reports a test-equated, rescaled score. A score of 75 or greater passes. That figure is not the percentage of questions you answered correctly, and the raw number of correct answers needed to reach it changes with the difficulty of the version you sit.
Two consequences follow.
First, a colleague's account of "the percentage you need" is worthless, however confidently delivered. There is no such percentage.
Second, and more usefully, your goal is not to hit a number. It is to build a comfortable margin of genuine competence, because the standard is fixed even though the raw mark that expresses it moves. Aiming to scrape a threshold that shifts is a poor strategy; aiming to be comfortably beyond it is the only reliable one.
Your error log is the only feedback you will ever get
Here is a fact that should change how you prepare from day one.
If you fail, the NDEB reports your test-equated score and no further breakdown. You will not be told which domains let you down. There is no diagnostic report, no subject-level analysis, and no list of weak areas.
That means the examination will never tell you what to fix. The only diagnostic information that will ever exist about your performance is the information you generate yourself, from your own practice.
So keep a proper error log from the beginning, and keep it honestly. Record what you got wrong, and specifically record whether it was a knowledge gap or a calibration gap, meaning a case where you knew the dentistry and applied the standard from the country you trained in. That distinction matters enormously, and we set it out in recalibrating your dentistry to Canadian standards.
Without that log, a failed attempt tells you a number and nothing else, and you will be preparing for the resit blind.
The four official documents, and how to use each
The web-based self-assessment. One hundred multiple-choice questions, free, from the examining board. This is not a study resource. It is a calibration instrument, and it is the closest thing you have to a preview of the real standard.
Use it once, properly: unseen, timed, before you have looked at any answers, at a point in your preparation where the result will actually inform your plan. The NDEB is explicit that the result neither prevents you from sitting nor guarantees you will reach the required score, and that is exactly the right way to read it: it is information, not a prediction.
What you must not do is work through it repeatedly until you have memorised the answers, which converts your only honest benchmark into a set of remembered items and tells you nothing.
The released question bank. Real questions, from the people who write the exam. This is the best guide you will ever get to the style, the level, and the way the examiners construct a stem and its distractors. Treat it the same way: work through it once, deliberately, and extract the pattern rather than the answers.
The reference text list. The NDEB publishes the reference texts recommended in Canadian faculties of dentistry, and it updates it. If you are choosing between resources, this list tells you what the examiners consider authoritative, which is a more useful signal than any commercial course's marketing.
The statement of required knowledge, skills and abilities. This is the target: what a beginning dental practitioner in Canada is expected to know and do. Read it, and use it as your coverage checklist rather than a commercial syllabus, because it is the examiners' own description of what they are assessing.
Preserve some of it
The discipline that almost nobody keeps.
The official material is finite and non-renewable. If you exhaust it in the first fortnight, you will have nothing genuinely representative to benchmark against in the final weeks, which is exactly when an honest readiness signal matters most and is hardest to obtain.
Split it. Use some early, to calibrate your method and adjust your plan. Keep a portion unseen, and sit it under realistic conditions two or three weeks before your exam. That result, unseen and official, is the closest thing to a predictor you will ever have.
The two-part day
A practical point about the structure, which candidates rarely plan for.
The AFK is delivered in two parts, with two hours for each. That is four hours of testing, and sustained accuracy across it is a trainable skill that is not the same as knowing dentistry.
Build to full-length practice. Sit two-hour blocks, timed, and then at least once sit both parts in a single sitting with a realistic interval between them, because that is what you will actually do.
Use the interval deliberately rather than by default. Eat something light, move away from the screen, and refuse to relitigate the first part, which is finished and unchangeable. The only marks you can still influence are in the part in front of you, and candidates who spend the break replaying questions they cannot change arrive at the second part depleted.
Do not spend an attempt on reconnaissance
Finally, the constraint that ties this together.
You have three attempts at the AFK. That is not many, and it makes the strategy of "sit it once to see what it is like" both expensive and unnecessary, because the official self-assessment and released questions give you exactly that information for nothing.
Use the free materials to learn the exam. Use your attempts to pass it.
Where iatroX fits
iatroX's NDEB AFK bank gives you the volume, the coverage and the adaptive targeting that the official materials, being finite, cannot: enough questions to actually learn from, an engine that returns the standards and concepts you keep getting wrong, and spaced repetition to hold Canadian classifications and protocols across a long preparation. Missed questions can be opened in the Socratic Tutor, which asks you to reason before it explains. Use the bank to build, and preserve the NDEB's own material to measure. Try it with free sample questions at iatroX.
Frequently asked questions
What percentage do I need to pass the AFK? There is no fixed percentage. The AFK reports a test-equated, rescaled score, and a score of 75 or greater passes. The raw number of correct answers required to reach it varies with the version you sit, so chasing a percentage is not meaningful.
Will the NDEB tell me which topics I failed on? No. A failing result comes with your test-equated score and no further breakdown. This means your own error log is the only diagnostic information that will ever exist about your performance, which is why keeping one from the start matters.
How should I use the free self-assessment? Once, properly: unseen, timed, before you have looked at any answers, at a point where the result can still change your plan. Working through it repeatedly until you have memorised the answers destroys its only real value, which is calibration.
Should I sit the exam early just to see what it is like? No. You have only three attempts, and the NDEB provides a free self-assessment and a released question bank that show you the format and standard without consuming one. Use the free materials to learn the exam and your attempts to pass it.