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Aim: To evaluate the effects of bonding agents, composite resins, and reattachment techniques on impact strength of permanent maxillary central incisors in which fragment reattachment was done. Materials and methods: Ninety permanent maxillary central incisors were collected and standardized fragments were obtained from 80 incisors by sectioning them 3 mm away from the incisal edge. The teeth specimens were distributed into eight test groups and one control group (n = 10) according to the reattachment technique (direct bonding or circumferential chamfer); adhesive system (single bond or Clearfil SE Bond); and intermediate material (Filtek flow or RelyX U200). The impact strength of reattached tooth was evaluated using universal testing machine Instron. The results were analyzed using one-way analysis of variance (ANOVA) and Tukey’s multiple post hoc analysis. Results: The fragment reattachment using circumferential chamfer was significantly superior to direct bonding. The use of single bond significantly increased the impact strength when compared with the use of Clearfil SE. Conclusion: No technique or material, when individually considered, was capable of achieving the impact strength of the sound teeth; however, the association of reattachment technique circumferential chamfer with adhesive system (single bond) could approximate the impact strength of sound teeth. Clinical significance: By achieving knowledge about the right materials and techniques for reattachment, this treatment modality could be used as a viable and feasible option for the uncomplicated fractured anterior teeth.

Effect of Materials and Techniques on Impact Strength of Reattached Anterior Fractured Teeth: An in vitro Study