You moved countries for this. The AFK is gate one.

01 — What it is

The first gate in the Canadian equivalency pathway.

The AFK is administered by the National Dental Examining Board of Canada (NDEB). It is a 200-item single-answer multiple-choice exam delivered in two parts over four hours with one scheduled break, available at Prometric test centres or in paper format at select Canadian sites. The 2026 NDEB AFK Protocol (effective January 19, 2026) maps every item to one of nine blueprint domains, with Applied Biomedical Sciences (20%) the largest band. Passing the AFK is a prerequisite to the Assessment of Clinical Judgement and the practical components that follow. Lumen’s Full Mock extends to 200 items for deeper practice coverage, matching the official exam length.

Candidates sit the exam at NDEB-approved Prometric centres in Canada, Australia, and New Zealand, plus paper-format Canadian sites, twice a year (February and August). Results are reported as pass/fail using test-equated re-scaling against a reference examination, with a passing scaled score of 75. A topic-level breakdown of relative performance accompanies the result — which is what makes a topic-aware study plan so much more useful than flat content review.

02 — Pass rate, in practice

It is not impossible. It is not easy either.

First-attempt AFK pass rates are not publicly reported by the NDEB. Community estimates have ranged from fifty to sixty-five per cent across recent cycles; treat external claims with caution. The more useful pattern, regardless of the headline number: candidates who fail the AFK rarely fail it on a single weak domain — they fail it on three or four near-passing topics that compound. A study plan that lifts your weakest four topics is almost always more efficient than another global pass through familiar material.

03 — What is tested

Nine domains, unevenly weighted.

The 2026 NDEB AFK Protocol blueprint defines the testable content. Lumen mirrors that taxonomy directly — below is the live topic list driving every AFK practice item we generate.

• Biomedical Sciences

  High yield

  Anatomy, biochemistry, biomaterials, cariology, growth and development, histology, immunology, microbiology, oral embryology, physiology. (10 NDEB Domain 1 sub-disciplines per the 2026 AFK Protocol; pathology lives in Domain 3.)

• Pharmacology

  High yield

  Drug classes, mechanisms, dental-relevant interactions and adverse effects.

• Operative Dentistry

  Restorative materials, cavity prep principles, isolation, finishing.

• Endodontics

  Pulpal diagnosis, canal anatomy, instrumentation, obturation.

• Periodontics

  Periodontal classification, etiology, non-surgical therapy, maintenance.

• Prosthodontics

  Fixed and removable prosthodontics, occlusion, impression principles.

• Oral Surgery

  Exodontia, complications, infection control, medical emergencies.

• Oral Medicine & Pathology

  Soft-tissue lesions, differential diagnosis, systemic-oral links, oral pathology.

• Oral Radiology

  Image interpretation principles, normal anatomy, pathology recognition.

• Pediatric Dentistry

  Behaviour management, primary dentition, eruption, trauma.

• Orthodontics

  Malocclusion classification, growth, interceptive treatment.

• Ethics & Jurisprudence

  Professional conduct, consent, confidentiality, scope of practice. (Group also covers Evidence-Based Dentistry, Prevention, and Infection Control sub-areas per NDEB Domain 9.)

04 — A working study plan

Eight to twelve weeks, cycled.

1. Week 1 — diagnostic. Sit a full-length timed mock cold, before any review. The point is not the score. The point is the topic breakdown that tells you where the leverage is.
2. Weeks 2–5 — content sweep. One domain per two to three days. Read against a published reference, work twenty to thirty practice items in that topic at the end of each block, and write the rationale out in your own words for any item you missed.
3. Weeks 6–9 — mixed practice. Switch from topic-by-topic to mixed mocks. Aim for two half-mocks per week and one full-length every ten days, all under timed conditions.
4. Weeks 10–12 — close the gap. Re-sit a full mock weekly. Pick the bottom two topics each time and run targeted topic practice until that ranking moves.
5. Week of the exam. Light, mixed, short. No new content. Sleep, hydrate, and do not chase a final cramming session that wrecks your timing.

05 — Sample question style

What an AFK item feels like.

AFK items are single-best-answer multiple choice with four to five options. Stems are short, clinically anchored, and almost always require a discriminating step — not just recall, but applying a fact to a small clinical situation. We do not reproduce real AFK items on this page, and Lumen does not use recalled exam content. Every Lumen practice question is written against the published NDEB competency document and reviewed by a licensed clinician before it reaches you.

06 — Exam-day notes

The test is also a stamina event.

• Bring valid government photo ID and the confirmation issued by NDEB. Without both, you will not be seated.
• Pace at roughly one minute per item. If a stem is taking ninety seconds, mark for review and move on.
• Use the navigator at the end of each section. Items you flagged are almost always where the points are.
• Do not change answers without a concrete reason. Second-guessing on intuition costs more marks than it earns.