Comparative evaluation of fracture resistance of wide and flared endodontically treated teeth with new techniques of postplacement - An in vitro study

This study aims to compare and evaluate the fracture resistance of endodontically treated maxillary anterior teeth restored using new postplacement techniques. Forty-five single-rooted maxillary anterior teeth ( = 15) were selected and decoronated at the cementoenamel junction. The working length was determined using a 15K file. Biomechanical preparation was done up to size 70 and the teeth were obturated. After 1 week, the root-filling material, gutta-percha, was removed, and postspace was prepared using a size 3 and 4 peeso reamer. The samples were divided into three groups ( = 15). Group I: Coltene Tenax fiber Post-reinforced with composite (anatomical post). Group II: Coltene Tenax fiber postreinforced with a leno-woven polyethylene; Ribbond fibers. Group III: Coltene Tenax fiber Post-luted with a dual cure cement. After postcementation, core buildup was done. Fracture resistance was measured using a universal testing machine. Statistical analysis was done using one-way analysis of variance and Tukey's tests. A statistically significant difference was seen in the mean maximum load ( ) between the groups. Group I showed the highest mean maximum load ( ), followed by Group II and Group III. A significant value ( = 0.025) was noted. Coltene Tenax fiber postreinforced with composite (anatomical post) showed the highest fracture resistance in endodontically treated maxillary anteriors.