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Online ISSN 1827-174X
Bergoli C. D. 1, Amaral M. 1, Baldissara P. 2, Valandro L. F. 3
1 Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil;
2 Department of Oral Science, Alma Mater Studiorum University of Bologna, Bologna, Italy;
3 Division of Prosthodontics, Department of Restorative Dentistry, School of Dentistry, Federal University of Santa Maria, Santa Maria, Brazil
AIM: Aim of this study was to evaluate the fatigue resistance of bovine roots adhesively restored with three fiber posts.
METHODS: Twenty-four single-rooted bovine teeth were allocated into three groups (N.=8): Gr1- White Post DC; Gr2- DT Light Post; Gr3- FRC Postec Plus. Teeth were prepared using the preparation drill of the specific fiber post system for each group. After the specimen was embedded in a cylinder, using acrylic resin, up to 3 mm of the most coronal portion of the specimen, the posts were all cemented with same materials: Single Bond + Relyx CRA. After cementation, a standard core build-up was made with composite resin. The specimens were submitted to mechanical cycling (1.400.000, 50N, 8 Hz, 37°C). After fatigue testing, a score was given to each specimen. The scores were submitted to Kruskal-Wallis (α=0.05) and the fractures were observed.
RESULTS: The performance after mechanical fatigue cycling was similar for the three fiber posts systems (P=0.366). Just one failure was noted from each group, a failure at the composite core.
CONCLUSION:The tested fiber posts had good performance, but attention should be taken regard of the adhesion of composite core to fiber past.