The material Top

The unique microstructure of ZLS

The outstanding chemical properties of ZLS provide a unique microstructure, allowing for exquisite beauty, strength and speed. Celtra delivers exceptional performance, including optimized balance of translucency and opalescence, reduced crystal size which serves to increase flexural strength, and a fine microstructure for processing speed efficiencies.

Dr. Markus Vollmann
We are very proud to have developed an innovative material with Celtra Press that fully meets our ambitious goals. Dr. Markus Vollmann
Director Research & Development
Dentsply Sirona Prosthetics

COMPARISON OF MICROSTRUCTURES

Celtra – ZIRCONIA-REINFORCED LITHIUM SILICATE

Celtra – ZIRCONIA-REINFORCED LITHIUM SILICATE
The inclusion of 10% zirconium oxide ensures particularly high strength. The crystallites formed are four to eight times smaller than lithium disilicate crystallites. The result is an ultra-fine microstructure that combines high average flexural strength with a high glass content. This has positive effects on the light-optical and mechanical properties of the material.

LITHIUM DISILICATE CERAMIC

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The crystallites embedded in the glass phase are 2000–4000 nm in size and thus significantly larger than Celtra, influencing both the light-optical and mechanical properties of the material. This is associated with lower light conductivity and requires a greater polishing effort.
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