title: Fracture resistance of endodontically treated teeth with different heights of crown ferrule restored with prefabricated carbon fiber post and composite resin core by intermittent loading.
abstract: This study evaluated the fracture resistance of endodontically treated teeth restored with prefabricated carbon fiber posts and varying quantities of coronal dentin. Sixty freshly extracted upper canines were randomly divided into groups of 10 teeth each. The specimens were exposed to 250,000 cycles in a controlled chewing simulator. All intact specimens were subjected to a static load (N) in a universal testing machine at 45 degrees to the long axis. Data were analyzed by 1-way analysis of variance and Tukey test (alpha = .05). Significant differences (P < .001) were found among the mean fracture forces of the test groups (positive control, 0 mm,1 mm, 2 mm, 3 mm, and negative control groups: 1022.82 N, 1008.22 N, 1292.52 N, 1289.19 N, 1255.38 N, and 1582.11, respectively). These results suggested that the amount of coronal dentin did not significantly increase the fracture resistance of endodontically treated teeth restored with prefabricated carbon fiber post and composite resin core.
authors: Department of Prosthodontics, Amazonas State University, Manaus-Amazonas, Brazil.
authors: Jonas Alves
authors: JA
authors: de Oliveira
authors: Jefferson Ricardo
authors: JR
authors: Pereira
authors: Accácio
authors: A
authors: Lins do Valle
authors: Lucas Villaça
authors: LV
authors: Zogheib
mesh_terms: D002244:Carbon; D000077482:Carbon Fiber; D003188:Composite Resins; D003442:Crowns; D003481:Cuspid; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis; D003804:Dentin / Q000502:physiology; D006801:Humans; D011176:Post and Core Technique; D014082:Tooth Fractures / Q000517:prevention & control*; D019553:Tooth, Nonvital / Q000503:physiopathology*
chemical_list: D000077482:Carbon Fiber; D003188:Composite Resins; D002244:Carbon