Class II Cavity Final Preparation

Depth of Proximal ditch cut

• 1.5mm-2mm

• 0.5mm

• 0.5mm-0.8mm

• 2mm

Bur Used for Cavity preparation

• 145

• 245

• 230

• 271

Proximal wall clearance

• 0.5mm

• 1.5mm

• 0.8mm

• 2mm

NOT an resistance form

• Rounding of Axio-pulpal Line angle

• Occlusal Convergence

• Reverse Curve

• Flat Floor

Retention Form

• Flat Floor

• Reverse Curve

• Rounding Line angles

• Dovetail