Multilayer zirconia block

Multilayer zirconia block (multilayer zirconia block is a zirconium oxide material layered by a special process, designed to combine high strength and high aesthetics, mainly used for dental restorations (such as all-ceramic crowns, bridges, etc.). It changes the light transmittance and color gradient of zirconium oxide to make it closer to the visual effect of natural teeth while maintaining excellent mechanical properties.

Features of multilayer zirconia block

Layered structure design

It is composed of zirconium oxide layers with different light transmittance and color (such as the neck is more opaque and the cutting end is more transparent), imitating the color transition and optical properties of natural teeth.

Common layering:

Neck layer: high strength, low light transmittance (covering the color of the abutment tooth).

Body layer: medium light transmittance, simulating dentin.

Incisor layer: high light transmittance, similar to natural enamel.

Both strength and aesthetics

The base part uses high-strength zirconium oxide (such as 3Y-TZP, bending strength ≥1000 MPa), ensuring durability.

The outer layer is improved by gradient dyeing or light-transmitting treatment, especially suitable for anterior tooth restoration.

Reduce the risk of veneer porcelain chipping

Traditional zirconia crowns require external veneer porcelain layer (PFZ) for beautification, but the veneer porcelain is prone to chipping.

multilayer zirconia block can be directly polished (monolithic zirconia), or only a small amount of veneer porcelain is needed to reduce the probability of porcelain chipping.

Clinical application of multilayer zirconia block

Anterior tooth aesthetic restoration: use its light-transmitting gradient to achieve realistic effects.

Posterior teeth high load area: the high-strength layer of the base ensures fracture resistance.

Full zirconium bridge: avoid veneer porcelain chipping, better long-term stability.

Summary

Multilayer zirconia solves the problem of “strength and beauty cannot be achieved at the same time” of traditional zirconia through material science optimization