Every NDHCE question maps to a published blueprint — the map of competencies the exam is built to measure. From the May 2026 sitting onward, that blueprint reflects the 2021 Entry-to-Practice Canadian Competencies for Dental Hygienists. If you know how the seven domains are weighted, you can stop studying blindly and start putting your hours where the marks actually are.
Here’s the whole picture, then a plain-language tour of each domain.
The seven domains and their weights
| Domain | Share of scored items |
|---|---|
| A — Professionalism | 5–11% |
| B — Evidence-informed Practice | 2–8% |
| C — Communication | 2–8% |
| D — Collaboration | 11–17% |
| E — Practice Management | 5–11% |
| F — Prevention, Education & Health Promotion | 17–23% |
| G — Clinical Therapy | 37–43% |
Two things jump out. Clinical Therapy alone can be over 40% of the exam, and together with Prevention/Education it’s well past half. The other five domains matter, but no single one rivals those two.
How you’re tested: it’s mostly application
The blueprint also weights cognitive level — the kind of thinking each item demands:
| Level | Share |
|---|---|
| Knowledge (recall) | 10–20% |
| Application | 55–65% |
| Critical thinking | 20–30% |
Roughly 80% of the exam is application and critical thinking. That single fact should reshape how you study: drilling flashcards prepares you for the 15% that’s recall, while practising cases and reasoning prepares you for the 80% that isn’t.
A tour of the domains
G — Clinical Therapy (37–43%). The heart of the exam: the dental hygiene process of care (assessment, diagnosis, planning, implementation, evaluation), periodontal assessment and staging/grading, instrumentation, scaling and root planing, pain and anxiety management, and care of medically complex clients. If you master one domain, make it this one.
F — Prevention, Education & Health Promotion (17–23%). Caries risk assessment, fluoride and sealants, oral hygiene instruction, nutrition, tobacco cessation, and community oral health. Heavily evidence-based and very testable.
D — Collaboration (11–17%). Working within the healthcare team, referrals, interprofessional communication, and continuity of care. Larger than candidates expect.
E — Practice Management (5–11%). Infection prevention and control, workplace safety, records and documentation, and the business/administrative side of practice.
A — Professionalism (5–11%). Ethics, professional accountability, self-regulation, scope of practice and jurisprudence. This is a classic Canada-specific area — reflecting the CDHA Code of Ethics and provincial regulation, not US rules.
B — Evidence-informed Practice (2–8%). Finding, appraising and applying research; understanding study design and levels of evidence. Small but real.
C — Communication (2–8%). Client-centred communication, informed consent, motivational approaches, and adapting to diverse clients — including cultural safety.
Contextual variables
Items are written to reflect the real Canadian population. A question may specify a client’s age or gender when clinically relevant, integrate cultural context without stereotyping, and name a practice setting only when it matters. Expect scenarios drawn from clinical, community-health and administrative settings alike.
Turning the blueprint into a plan
- Weight your hours by the table. Clinical Therapy and Prevention/Education first, then Collaboration, then the rest.
- Practise application, not recall. Cases over flashcards, because that’s where 80% of the marks live.
- Don’t neglect the Canadian domains. Professionalism and Communication are small individually, but they’re exactly where borrowed US material gets it wrong.
- Self-assess against the competencies to find your weak domains, then target them — the approach at the core of our 8-week study plan.
Knowing the blueprint doesn’t just tell you what’s on the exam — it tells you what’s worth studying first. For how this all comes together on exam day, see the format overview, and to understand how the marks become a pass/fail result, read how the NDHCE is scored.
Sources: FDHRC, Overview of the NDHCE (2026), blueprint domains and cognitive-level weightings; 2021 Entry-to-Practice Canadian Competencies for Dental Hygienists. Confirm current details at fdhrc.ca.