Table 1.

Materials used for each group in the study

Group name	Product name	Manufacturer	Composition
Milled group (group M)	IPS e.max ZirCAD LT, Ivoclar Vivadent, USA LOT: Y43302	Ivoclar Vivadent AG, USA	Zirconium oxide (ZrO2) 88.0–95.5 wt%, yttrium oxide (Y2O3) > 4.5– ≤ 6.0 wt%, hafnium oxide (HfO2) ≤ 5.0 wt%, aluminum oxide (Al2O3) ≤ 1.0 wt%, other oxides for coloring ≤ 1.0 wt%
Printed group (group P)	Lithacon 3Y 210, Lithoz, Vienna, Austria LOT: AB0722038	Lithoz GmbH, Vienna, Austria	Zirconium oxide (ZrO2) 3 mol-%Y2O3 stabilized