Table 1.

Overview of the materials tested in this study.

Brands	Material Type	Manufacturer	Batch No.	Composition
Core Materials
Dentokeep	PEEK	nt-trading, Karlsruhe, Germany	11DK14Q01	PEEK, 20 wt % anorganic fillers
IPS e.max ZirCAD	ZrO2	Ivoclar Vivadent, Schaan, Liechtenstein	N35700	ZrO2, HFO2, Al2O3 and other oxides
Remanium GM 800+	CoCrMo	Dentanium, Ispringen, Germany	816	Co 63.3 wt %, Cr 30 wt %, Mo 5 wt %
Bio-Titan	TiO2	DCS Dental AG, Allschwil, Switzerland	8797	pure titanium grade 4
Veneering Materials
VITA Mark II A3	glass-ceramic	VITA Zahnfabrik, Bad Säckingen, Germany	29380	SiO2: 56–64 wt %, Al2O3: 20–23 wt %, Na2O: 6–9 wt %, K2O: 6–8 wt %, CaO: 0.3–0.6 wt %
IPS e.max CAD A3	lithium disilicate glass-ceramic	Ivoclar Vivadent, Schaan, Liechtenstein	S14448	SiO2, Li2O, K2O, MgO, Al2O3, P2O5 and other oxides
LAVA Ultimate	resin nano ceramic	3M ESPE, Seefeld, Germany	N435300	Polymer with appr. 80 wt % anorganic filler
VITA Enamic	hybrid dental ceramic	VITA Zahnfabrik, Bad Säckingen, Germany	36810	86 wt % feldspar ceramic, 14 wt % polymer