Comparative Evaluation of Fracture Toughness and Flexural Strength of Four Different Core Build-up Materials: An Study.

Aim: To evaluate and compare the fracture toughness and flexural strength of four different core build-up materials.

Materials And Methods: A total of 60 samples were divided into four groups ( = 15) group I: dual cure composite resin reinforced with zirconia particles (Luxacore Z), group II: light cure composite resin (Lumiglass DeepCure), group III: zirconia reinforced glass ionomer cement (GIC) (Zirconomer Improved), and group IV: chemically cure composite resin (Self Comp) respectively. All the core build-up materials were manipulated according to the manufacturer's instructions and poured into the mold.