title: Surviving of bovine teeth adhesively restored with 3 types of fiber post after fatigue resistance.
abstract: OBJECTIVE
  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.
  
  
  CONCLUSIONS
  The tested fiber posts had good performance, but attention should be taken regard of the adhesion of composite core to fiber past.
authors.affiliation: Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
authors.forename: C
authors.initials: C
authors.lastname: Bergoli
authors.forename: M
authors.initials: M
authors.lastname: Amaral
authors.forename: P
authors.initials: P
authors.lastname: Baldissara
authors.forename: L F
authors.initials: LF
authors.lastname: Valandro
mesh_terms: D000818:Animals; D002417:Cattle; D003738:Dental Cements; D003799:Dental Stress Analysis; D008422:Materials Testing; D011176:Post and Core Technique; D014070:Tooth
chemical_list: D003738:Dental Cements