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M0 step 3 of 6 · No bur
Peel enamel, dentin and pulp
Turn on Layers and the cut view. Find the enamel, the dentin under it and the pulp, and see how close the pulp sits under the occlusal table.
Your last prep
No prep scored yet. Your first score is free with an account.
Score a prep free- Target
- Occlusal reduction: 1.0–2.0 mm
- Why
- The occlusal reduction band is a depth into these layers; the cut view shows why too deep is critically deficient.
- Watch
- The sheets publish no band for layer thickness; read only the reduction band.
After the lesson: Retake the photos and score again on the 5 checkpoints.
Sources and 3D credits
Sources: Crown-prep criteria sheet, zirconia molar (#3), 2026–27 season, pp. 1–2 (checked 2026-10-28)
3D model: molar30.glb: teeth #29–#31, jaw bone and gum. BodyParts3D, © 2008 Life Science Integrated Database Center (DBCLS); modified by Osler Press. CC BY-SA 2.1 JP · source
3D viewer code. three.js authors. MIT · source
3D viewer code. three.js authors. MIT · source
Step 3: Peel enamel, dentin and pulp
No prep scored yet · target 1.0–2.0 mm
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TOOLNo bur
CHECKPOINTOcclusal reduction: 1.0–2.0 mm
WHYThe occlusal reduction band is a depth into these layers; the cut view shows why too deep is critically deficient.
Do
Turn on Layers and the cut view. Find the enamel, the dentin under it and the pulp, and see how close the pulp sits under the occlusal table.
WatchThe sheets publish no band for layer thickness; read only the reduction band.
Sources: Crown-prep criteria sheet, zirconia molar (#3), 2026–27 season, pp. 1–2 (checked 2026-10-28)
3D model: molar30.glb: teeth #29–#31, jaw bone and gum. BodyParts3D, © 2008 Life Science Integrated Database Center (DBCLS); modified by Osler Press. CC BY-SA 2.1 JP · source
3D viewer code. three.js authors. MIT · source
3D viewer code. three.js authors. MIT · source
Outline · 8 parts
✓Criteria card✓Anatomy in 3D3Steps1Find tooth #30 and tooth #32Name the five surfaces of #303Peel enamel, dentin and pulp4Read the five checkpoints on a finished prep5Photograph the prep on the grid card6Read your score band by band4Within vs outside5Check6Guided cut7Cut and score8Recall: day 3 and day 10Practice feedback against the 2026–27 published crown-prep criteria (molar). Not an exam or admissions result; your program and examiners decide.