Table 2. Compositions of the resin cement and adhesive material.

Materials	Product	Batch no.	Composition
Resin cement	RelyX Unicem (3M ESPE, Seefeld, Germany)	620124	Powder: glass fillers, silica, calcium hydroxide, self-cure initiators
			Liquid: methacrylate phosphoric esters, dimethacrylates, acetate, stabilizers, self-cure initiators
Adhesive system	Visio. Link (Bredent, Senden, Germany)	165127	MMA, PETIA, dimethacrylates, photoinitiators
PEKK (crystalline)	Pekkton Ivory, Cendres+Métaux, (Biel/Bienne, Switzerland)	200368	Polyetherketoneketone, titanium dioxide pigments

MMA: methylmethacrylate, PETIA: pentaerythritol triacrylate