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Kumar L, Pal B, Pujari P.2014. An assessment of fracture resistance of three composite resin core build-up materials on three prefabricated non-metallic posts, cemented in endodontically treated teeth: An in vitro study. PeerJ PrePrints2:e666v1https://doi.org/10.7287/peerj.preprints.666v1
Endodontically treated teeth with excessive loss of tooth structure would require to be restored with post and core to enhance the strength and durability of the tooth and to achieve retention for the restoration. The non-metallic posts have of a superior esthetic quality. Various core materials can be used to build-up cores on the posts placed in endodontically treated teeth. The core materials would show variation in their bonding with the non-metallic posts and the remaining tooth structure. They will also have an effect on the strength and resistance to fracture of the remaining tooth structure. Aims: The aim of the study was to assess the fracture resistance of three composite resin core build-up materials on three prefabricated non-metallic posts, cemented in extracted endodontically treated teeth. Material and methods: Forty five freshly extracted maxillary central incisors of approximately of the same size and shape were selected for the study. Student’s unpaired ‘t’ test was also used to analyse and compare each group with the other groups individually, and decide whether their comparisons were statistically significant. Results: Luxacore showed the highest fracture resistance among the three core build-up materials with all the three posts systems. Ti-core had intermediate values of fracture resistance and Lumiglass had least values of fracture resistance.
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