Comparison of Marginal and Internal Adaptation in Endocrowns Milled from Translucent Zirconia and Zirconium Lithium Silicate

Table 1

The physical properties of ceramic materials used in the study.

Group	Ceramic type	Flexural strength	Fracture toughness (SEVNB)	E-modulus	Vickers hardness	Brittleness index
ZLS (Celtra Duo)	Zirconium lithium silicate ceramic	Mill and polish: 210 MPa	2 MPa m^0.5	Approx. 70	6.86 GPa	2.84 µm^−1/2† [15]
		Mill and fire: 370 MPa
Zr (DD Bio ZX^2)	High-translucent zirconium oxide ceramic	1100–1250 MPa	>10 MPa m^0.5	>200	5.41–15.47 GPa^† [18, 19]	1.52–3.15 μm^−1/2† [18]

According to the manufacturer’s claim. ^†According to the available data on the same material type, but different brand, due to the lack of data on the particular brand used in the present study.