Fracture Resistance of Endodontically Treated Teeth Restored with All Ceramic Hybrid Custom Posts and Cemented with Different Resin Cements

Abstract

This study has been designed to evaluate the effect of two new hybrid ceramics when they are used as a custom made post and core and cemented with two types of resin cements on fracture resistance of endodontically treated teeth. The two hybrid ceramic materials are Vita-enamic and Cerasmart.They have been cemented by Bisco Duo-Link universal adhesive cementation system and G-cem LinkAce™ self-adhesive cement. Thirty extracted single canal Premolar were selected. Crowns were sectioned 2mm. shorter to the level of the CEJ. Teeth were root canal treated, obturated using gutta-percha. All teeth were prepared for making one-piece resin post core pattern. This pattern was scanned by CAD.Vita-enamic posts and Cerasmart posts were milled using CAM. All teeth were assigned to one of five groups (N = 5 per group).For group1: cementation of the vita-enamic posts was done using adhesive resin cement system. For group 2 cementation of the vita-enamic hybrid ceramic posts using self-adhesive resin cement. For group 3 cementation of the Cerasmart hybrid ceramic posts using adhesive resin cement system. For group 4