Method · v3
Built for practice.
Lumen started because the dental-board prep market was broken. Question banks were either ten years old or sourced from recalled content — sometimes both. The good ones cost a month’s rent and still left candidates guessing which topic was actually costing them marks.
So we built our own. Our questions are framed against published competency blueprints, screened by automated checks, and explained with rationales that cite their references. Reviews can still miss errors, so we rely on your feedback to keep the bank accurate.
Today: 9 boards, 23,000+ practice questions, one promise we won’t make — that you’ll pass. That part is on you.
Current question workflow
How a question is built.
STAGE 01
Mapped
Each question is framed against published competency blueprints, then tagged to a topic.
STAGE 02
Checked
Automated format, answer-key and duplicate checks screen every question before it enters the bank.
STAGE 03
Explained
Questions come with rationales that explain the answer and cite the references they draw on.
STAGE 04
Student ready
Item enters the bank, gets blueprint-weighted into your next diagnostic or mock — and your weak-topic feed adapts.
Behind Lumen
Independent.
Source-informed.
Lumen is an independent study platform. Our questions are organised by published competency blueprints, with rationales with cited references and automated format, answer-key and duplicate checks. Errors can still slip through. Use the cited references and flag unclear questions for review.
23,000+
practice questions
9
boards covered
Free
diagnostic, no signup
Independent study tool. Not affiliated with or endorsed by NDEB, ADA, JCNDE, FDHRC, NDAEB, or DANB. Items are framed against publicly available competency guidelines — never proprietary content. We don’t promise passing scores.