Root-canal visual revision — 4 October 2026

CLINICAL IMAGES
1. Abscessed tooth periapical radiograph.jpg
   Coronation Dental Specialty Group, 2013; original arrows retained.
   https://commons.wikimedia.org/wiki/File:Abscessed_tooth_periapical_radiograph.jpg
   CC BY-SA 3.0: https://creativecommons.org/licenses/by-sa/3.0/
   Displayed as a complete image without clinical alteration. Original provided in assets/periapical-real.jpg under the same license. Not this presenter's patient; no endorsement implied.
2. Diquedegoma.jpg
   JASFUS, Wikimedia Commons.
   https://commons.wikimedia.org/wiki/File:Diquedegoma.jpg
   CC BY-SA 3.0: https://creativecommons.org/licenses/by-sa/3.0/
   Complete clinical photograph, displayed without clinical alteration. Original provided in assets/dam-detail-real.jpg under the same license. Demonstrates isolation, not a claimed root-canal case.
3. Root canal therapy 8.JPG
   Salvia71, 2008. CC0 public-domain dedication.
   https://commons.wikimedia.org/wiki/File:Root_canal_therapy_8.JPG
   https://creativecommons.org/publicdomain/zero/1.0/
   Reference acquired but not selected as an ideal postoperative example.

CLINICAL REFERENCES
https://www.aae.org/patients/root-canal-treatment/what-is-a-root-canal/
https://www.aae.org/patients/root-canal-treatment/what-is-a-root-canal/root-canal-explained/
https://www.aae.org/specialty/wp-content/uploads/sites/2/2023/12/Fall2013-EndoDiagnosis.pdf
https://www.aae.org/specialty/wp-content/uploads/sites/2/2018/04/TreatmentStandards_WhitePaper_v1.pdf
https://www.aae.org/wp-content/uploads/2021/05/VitalPulpTherapyPositionStatement_v2.pdf
https://www.mouthhealthy.org/all-topics-a-z/root-canals

ILLUSTRATIONS
Original Teeth.com generated cutaways and existing approved crown illustration assets. Simplified anatomy, not patient photographs. The root-canal instrument, disinfecting-flow schematic, filling and callout movement are controlled educational animation, not clinical footage. No implication that simplified diagrams prescribe instrument settings or technique.

October 5, 2026 correction: the cold-test scene is a generated clinical illustration of cotton pliers applying a chilled cotton pellet to outer enamel. The irrigation, full-width gutta-percha/sealer, sealed core and crown scenes use controlled animation and matched generated tooth plates. These are illustrations, not clinical photographs or treatment footage.
Cold-test reference: https://dpes.dentistry.utoronto.ca/dpes-old/node/1156.html
Obturation reference: https://www.aae.org/specialty/the-changing-philosophy-of-root-canal-obturation/

VOICE
Existing authorized HeyGen presenter and voice; expanded diagnosis and procedure narration in separate draft eddc28b1229f44fdb692d947b8c0f56c. Previous approved versions retained.

REVISION 4 — 4 October 2026
Two new assets generated using the built-in image tool: realistic fluted file and controlled bite-test illustration. Exact prompts are saved alongside this file. Clinical crack-testing reference: https://www.aae.org/specialty/cracking-the-cracked-tooth-code-from-unpredictability-to-predictability/ . Bite testing contributes to an examination; it does not establish a crack or pulp diagnosis on its own.

October 4, 2026: Patient question clip and synchronized speech generated with Runway (AI-assisted fictional patient). Office-style cover illustration created with OpenAI image generation. Existing presenter, clinical references and treatment illustrations retained.