Maxillary mucospid and molars
- Butt joint (1.2–1.5 mm)
- Interproximal box: always
- Axial walls: apically to maximum contour line
- Anatomical reduction of the occlusal surface
- Convergent walls (6–10 degrees)
- Inclined planes M–D, V–P (chamfer)
- Axial walls, coronal to maximum contour line
Mandibular molars and premolars
- Butt joint (1.2–1.5 mm)
- Interproximal box: always
- Axial walls: apically to maximum contour line
- Anatomical reduction of the occlusal surface
- Convergent walls (6–10 degrees)
- Inclined planes M–D, V–P (chamfer)
- Axial walls, coronal to maximum contour line
Veneziani 2017
Veneziani 2017
Veneziani 2017
Amount of reductions[^41][^42][^43]
- 1 to 1.5 mm of axial wall reduction
- 1.5 mm at least of occlusal reduction for cuspal coverage
- Margin 1 mm if present