Tooth-coloured fiber posts allow better reproduction of the underlying natural tooth shade, thus results in a more aesthetic restoration. The clinical success of a post and core restoration depends on the composite resin selected and the quality of the post and core interface, where materials of different compositions are in intimate retentive contact. The aim of this study was to measure the bond strength between Fiber reinforced composite-Glass fiber (FRC) post and three different types of

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... l cure composite core materials, namely Luxacore Z, Compcore AF and Paracore. A total of 60 test samples, 20 in each dual cure resin core material were prepared to assess the tensile bond strength between the core material and glass fiber post. The samples were then positioned on the testing jig and the retention tests were performed with universal testing machine. Failure load was registered in MPa (megapascals).Each failed specimen was observed with an optical microscope (Dinolite, ANMO Electronics Corporation) at x 20 magnifications, in order to classify the type of failure. Out of the three tested dual cure core materials, the Paracore revealed the highest tensile bond strength with glass fiber post followed by Luxacore Z and Compcore AF (F value of 8.75, p<0.0005) and all three dual cure resin core groups showed predominantly adhesive fractures between post and core.