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Objectives: The purpose of this in vitro study was to evaluate the fracture resistance of endodontically treated teeth restored by different post systems. Method: Forty-Five maxillary canines with , anatomically similar root segments were taken and then decoronated at the cementoenamel-junction. After establishing the working length 1 mm short of the apex, the canal was prepared by crown down technique using rotary protaper followed by obturation. After 24 hours, post space preparation was done using Pesso reamer. All the specimens were then being divided into 3 groups {Group 1 : Glass Fiber Posts, Group 2 : Carbon Fiber Posts, Group 3: Zirconia Posts}. The posts were then cemented into the tooth using a resin sealer and acrylic resin cylinders were obtained using cylindrical molds. Specimens were subjected to increasingcompressive load (N) until fracture. Results: There was significant difference between all the three groups i.e. (Group 1: Glass fiber post, Group 2: Carbon fiber post, Group 3: Zirconia post). Conclusion: Within the limitation of this study it was concluded that the Zirconia posts has the maximum fracture resistance followed by Glass fiber posts and Carbon fiber posts.

A Comparative Evaluation of Fracture Resistance of Endodontically Treated Teeth Restored By Different Post System – An Vitro Study