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M4 · 6 steps

M4: Class II composite

A Class II composite prep and restoration on #30 MO with #29 protected. Six steps cover a conservative outline, the proximal box behind a guard, margin finishing, incremental placement and the floss and occlusion check.

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M4 has 6 steps, a 3D view and checks. They open with the $99 season (90 days), the $149/yr student seat, or a class code that assigns this lesson. M0 and M1 are free.

Unlock the full library Open free M1
Sources: Published criteria sheet 1 · Published criteria sheet 2
English한국어
✕M4: Class II composite
M4: Class II composite

A Class II composite prep and restoration on #30 MO with #29 protected. Six steps cover a conservative outline, the proximal box behind a guard, margin finishing, incremental placement and the floss and occlusion check.

Outline · 6 steps
1. Plan conservative outline
2. Enter lesion with small round bur
3. Form proximal box using adjacent-tooth guard
4. Refine enamel margins/bevel where indicated
5. Place matrix/wedge and restore in increments
6. Finish margins and check floss/occlusion

Unlock the full library

M4 has 6 steps, a 3D view and checks. They open with the $99 season (90 days), the $149/yr student seat, or a class code that assigns this lesson. M0 and M1 are free.

Unlock the full library Open free M1
Sources: Published criteria sheet 1 · Published criteria sheet 2

Practice feedback against the 2026–27 published crown-prep criteria (molar). Not an exam or admissions result; your program and examiners decide.