Table 1 Code, manufacturers, composition and lot numbers of materials used

TT-GT, A2

UG

Upcera Dental Technology, Shenzhen, China

ZrO₂ + HfO₂ + Y₂O₃ > 96.5%; 5.8-9.7%Y₂O₃; Al₂O₃ < 0.5%, Fe₂O₃ < 0.5%, Er₂O₃ < 2.0%, Other oxides < 0.5%

-

TT-ML, A2

UM

Upcera Dental Technology, Shenzhen, China

ZrO₂ + HfO₂ + Y₂O₃ > 96.5%; 5.8-9.7%Y₂O₃; Al₂O₃ < 0.5%, Fe₂O₃ < 0.5%, Er₂O₃ < 2.0%, Other oxides < 0.5%

-

Cercon xt ML, A2

CX

Dentsply Sirona, Charlotte, NC, USA

ZrO₂; 9%Y₂O₃; HfO₂ < 3%; Al₂O₃, SiO₂, other oxides < 2%

18044511

Lava™ Esthetic Fluorescent Full-Contour Zirconia, A2

LE

3M, St. Paul, MN, USA

ZrO₂; 5 mol% Y₂O₃

7484966