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. 2022 Feb 16;22:41. doi: 10.1186/s12903-022-02072-x

Table 1.

Ceramic materials used in the study

Group Manufacturer Ceramic type Composition Flexural strength
ZLS (Celtra Duo) Dentsply Sirona Zirconium lithium silicate ceramic SiO2 (58%), P2O5 (5%), Al2O3 (1.9%), Li2O (18.5%), ZrO2 (10.1%), Tb4O7 (1%), and CeO2 (2%) Mill and polish: 210 MPa
Mill and fire: 370 MPa
Zr (DD BIO ZX2) Dental Direkt High-translucent zirconium oxide ceramic ZrO2 + HfO2 + Y2O3 (> 99%), Y2O3 (< 6%), Al2O3 (≤ 0.15%), and other oxides 1100–1250 MPa

Zr, zirconia; ZLS, zirconium lithium silicate