Zirconia Prep Guide
- Occlusal 1.0–1.5 mm (min. 1.0 posterior, 0.8 anterior)
- Chamfer or rounded shoulder, 0.8–1.0 mm
- Taper about 4–8°
Resources · Prep guides
Prep Guide
Visual preparation guides for zirconia (including Zerapure™), IPS e.max crowns, porcelain and e.max veneers, and inlays & onlays. Print them for the operatory or open them on the page.
General guidelines based on published manufacturer recommendations; contact Advanced Dental Laboratory for case-specific questions.
IPS e.max Prep Guide
- Incisal / occlusal 1.5–2.0 mm
- Axial 1.2–1.5 mm
- Rounded shoulder or deep chamfer ≥1.0 mm
Veneer Prep Guide
- Cervical 0.3–0.5 mm (e.max ≥0.6)
- Middle 0.5–0.7 mm · incisal third 0.7–0.9 mm
- Incisal edge 1.0–1.5 mm if covered
Inlay & Onlay Prep Guide
- Depth and isthmus ≥1.0 mm (aim 1.5–2.0)
- Box floor 1.0–1.5 mm
- Onlay cusps 1.5 mm (min. 1.0)
Zerapure™: our multilayered zirconia suits knife-edge, shoulder, chamfer or shoulder-bevel preps. See the Zerapure™ prep guide.
For bridges there are no fixed span or connector numbers: design is case-specific. Send the scan for a design review before you prep. Read more in Crown & veneer prep guidelines.