Help

Common questions.

Can’t find what you’re looking for? Email support@lumendental.ca or use the feedback button on any page.

Do I need an account to take the diagnostic?

No. You can take any diagnostic without signing up — answers and your topic gap analysis are saved to a guest cookie. Sign in afterward to keep your attempt history forever.

Which exams does Lumen cover?

AFK (NDEB), ACJ (NDEB), ACS (NDEB), ADAT, NBDHE, NDHCE, NDAEB, DANB RHS, and INBDE. Coverage and item counts vary — see each exam's landing page for current state.

How are rationales written?

Every item is reviewed by a licensed clinician and cross-checked against the published competency guidelines for that exam. We cite the source on every rationale.

Can I get a refund?

Yes — within 14 days of purchase, as long as you've used fewer than 25% of the questions in the bundle. Email support and we'll process it manually.

How do I report a bad item?

Press R while on any question, or use the feedback button in the bottom-right corner. Reports go to a queue our clinical reviewers work daily.

Is my study data ever sold or shared?

No. Your attempts, answers, and email are never sold, never shared with brokers, and never fed into third-party training datasets. The only software that touches your data is the engine that ranks your weakest topics for your next mock — and that runs in our infrastructure, against your account only.