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Attribution · v1

Image credits & licensing.

Lumen is building a proprietary CC-BY image library photographed and drawn by our clinical editorial team. Where in-house assets don’t yet cover a clinical scenario, we use Tier A open-licence sources — Wikimedia Commons, Open-i (NIH), PubMed Central OA, and NIDCR/CDC public-domain releases. Every image displayed inside a practice question is credited below.

744 images attributed across 3 licences

Licence

CC-BY-4.0

638 images

Creative Commons Attribution 4.0 International — commercial use permitted with credit.

Licence

CC-BY-SA-4.0

14 images

Creative Commons Attribution-ShareAlike 4.0 — credit + derivative works share the same licence.

Licence

CC0

92 images

Creative Commons Public Domain Dedication — no rights reserved, attribution offered as courtesy.

If you believe an image is attributed incorrectly or used outside its licence terms, contact us at help@lumendentalprep.com. We act on credible reports within two business days and remove or re-credit promptly.