How thin can zirconia be milled?

The number refers to mol% yttria stabilizer. 3Y-TZP has the highest flexural strength (around 1200 MPa) and lowest translucency, ideal for posterior crowns and full-arch frameworks. 4Y sits in the middle at roughly 900 MPa with improved translucency for premolar and bicuspid esthetics. 5Y reaches 700-800 MPa and the highest translucency, used for anterior crowns and veneers where shade depth matters more than maximum strength. Dani Dental stocks all three generations and selects per case.

Yes. 5Y zirconia veneers can be milled to 0.3mm at the incisal and 0.5mm at the body, which falls inside the range historically reserved for lithium disilicate. The tradeoff is that 5Y at veneer thickness has less fracture toughness than e.max at the same thickness, so case selection matters. Dani recommends 5Y zirconia veneers for patients with documented bruxism or thin enamel; for purely esthetic anterior cases on stable occlusion, lithium disilicate is often still the cleaner answer.

Thin zirconia (under 0.7mm) benefits from adhesive resin cementation rather than conventional cement, because the bond contributes meaningfully to the restoration's effective strength at that thickness. Surface treatment with airborne particle abrasion (50-micron alumina at 2 bar) followed by an MDP-containing primer is the documented protocol. Dani Dental ships every sub-0.7mm case with a cementation note clipped to the case packaging citing the specific primer and cement combination tested in our lab against that material lot.