Combined coronal and vertical root fractures are difficult to treat and extraction of the affected tooth is quite often indicated. In anterior teeth, esthetics and function must be reestablished immediately. This case describes the restoration of a fractured upper right central incisor using a glass fiber post and adhesive composite. At the follow-up appointment, 13 months later, clinical and radiographical examinations revealed the glass fiber post and restoration in place, suggesting the efficacy of the treatment in maintaining fractured tooth.

Endodontia; Canal Radicular; instrumentação.

Aim: This study evaluated the disinfection ability of ozonated water in comparison to sodium hypochlorite (NaOCl) solution in root canals infected with Enterococcus faecalis. Material and methods: Forty single-rooted bovine teeth were standardized and prepared using K-files. The root canals were contaminated for 21 days and the first microbial sample was collected from root canals (S1). The teeth were divided into 5 groups: Saline solution, 0.5% NaOCl, Ozonated water, and 2 control groups. The root canals were irrigated with 20 mL of the selected solution for an uninterrupted period of 20 minutes, the irrigant solution was maintained resting for 5 minutes and then, samples were collected from root canals (S2). The data was evaluated using Kruskal Wallis and Wilcoxon tests (P<0.05). Results: The NaOCl group had lower microbial counts (P<0.05) and a higher percentage of microbiological reduction than the other groups (P<0.05). Conclusion: It was determined that ozonated water was not a suitable substitute for NaOCl.

Objective: to evaluate the efficacy of Reciproc System, with or without solvent for endodontic filling removal from oval shaped root canals. The time required for gutta-percha removal and the instrument fracture were also evaluated. Material and Methods: forty straight single-rooted premolars were prepared up to a size 30 and filled with gutta-percha and sealer, then randomly assigned to two retreatment groups (n = 20), treated with Reciproc System with or without chloroform (RS+C and RS). For all roots, procedural errors, time of retreatment and apically extruded material were recorded. After retreatment, roots were split longitudinally and then photographed. All images were evaluated with Image Tool software to calculate the percentage of residual material. Kolmogorov Smirnov and t tests were used to determine significant differences at P < .05. Results: no treatment completely removed the root filling material from the root canals. Analysis of the total area did not reveal statistical differences between the two groups (P >.05). Both groups also showed similar results in all tested thirds, with no statistical differences (P >.05). RS without solvent was faster in filling material removal than RS+C (P <.05). For both groups, none of the instruments showed intracanal fracture or visible signs of plastic deformation. Conclusion: taken together, our results demonstrated that Reciproc System used without solvent required less time to remove the same amount of root filling material than Reciproc System with solvent. However, regardless of solvent use, the same cleaning quality was obtained.