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Fracture resistance of bone samples filled with fibre-reinforced composite posts: an ex vivo model

Rita Cauwels (UGent) , Luc Martens (UGent) and Ronald Verbeeck (UGent)
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Abstract
Aim: To evaluate the strengthening effect of two different types of fibre-reinforced composite (FRC) posts in an ex vivo experimental model. Methodology: Compact and hollow bone samples from bovine femurs were used as standardized samples. A total of 80 hollow samples were divided into two groups and filled either with a prefabricated FRC post or with individually adapted FRC posts. For each group, half of the samples were subjected to thermocycling (555 degrees C, 5000x). The remaining samples were kept for 24h at 37 degrees C at 100% relative humidity. All samples were loaded diametrically until fracture. The null hypothesis tested was that the fracture resistance of standardized bone samples is not influenced by the type of FRC post, independently of the exposure to thermocycling. Results were evaluated by anova, and subsequent multiple comparisons were performed. Results: The samples filled with the individually adapted FRC posts were more resistant to fracture than the prefabricated ones (P<0.001), but this difference was not apparent in the thermocycled groups. Detachment of the posts upon fracture was highest after thermocycling for both groups, amounting to 55% and 95% for the individual adapted posts and the prefabricated posts, respectively. Conclusions: Initially, the samples filled with the individually adapted FRC posts were more resistant to fracture than those filled with the prefabricated ones. However, after ageing of the samples, both types of posts had similar strengthening effects.
Keywords
STRENGTH, TEETH, fibre-reinforced composite post, endodontic post, CEMENT, immature teeth, in vitro model, reinforcement, ROOT-CANAL POSTS, MATRIX, IN-VITRO, GUTTA-PERCHA, INCISORS, DENTIN

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Chicago
Cauwels, Rita, Luc Martens, and Ronald Verbeeck. 2013. “Fracture Resistance of Bone Samples Filled with Fibre-reinforced Composite Posts: An Ex Vivo Model.” International Endodontic Journal 46 (5): 434–441.
APA
Cauwels, R., Martens, L., & Verbeeck, R. (2013). Fracture resistance of bone samples filled with fibre-reinforced composite posts: an ex vivo model. INTERNATIONAL ENDODONTIC JOURNAL, 46(5), 434–441.
Vancouver
1.
Cauwels R, Martens L, Verbeeck R. Fracture resistance of bone samples filled with fibre-reinforced composite posts: an ex vivo model. INTERNATIONAL ENDODONTIC JOURNAL. 2013;46(5):434–41.
MLA
Cauwels, Rita, Luc Martens, and Ronald Verbeeck. “Fracture Resistance of Bone Samples Filled with Fibre-reinforced Composite Posts: An Ex Vivo Model.” INTERNATIONAL ENDODONTIC JOURNAL 46.5 (2013): 434–441. Print.
@article{3091776,
  abstract     = {Aim: To evaluate the strengthening effect of two different types of fibre-reinforced composite (FRC) posts in an ex vivo experimental model.
Methodology: Compact and hollow bone samples from bovine femurs were used as standardized samples. A total of 80 hollow samples were divided into two groups and filled either with a prefabricated FRC post or with individually adapted FRC posts. For each group, half of the samples were subjected to thermocycling (555 degrees C, 5000x). The remaining samples were kept for 24h at 37 degrees C at 100\% relative humidity. All samples were loaded diametrically until fracture. The null hypothesis tested was that the fracture resistance of standardized bone samples is not influenced by the type of FRC post, independently of the exposure to thermocycling. Results were evaluated by anova, and subsequent multiple comparisons were performed.
Results: The samples filled with the individually adapted FRC posts were more resistant to fracture than the prefabricated ones (P{\textlangle}0.001), but this difference was not apparent in the thermocycled groups. Detachment of the posts upon fracture was highest after thermocycling for both groups, amounting to 55\% and 95\% for the individual adapted posts and the prefabricated posts, respectively.
Conclusions: Initially, the samples filled with the individually adapted FRC posts were more resistant to fracture than those filled with the prefabricated ones. However, after ageing of the samples, both types of posts had similar strengthening effects.},
  author       = {Cauwels, Rita and Martens, Luc and Verbeeck, Ronald},
  issn         = {0143-2885},
  journal      = {INTERNATIONAL ENDODONTIC JOURNAL},
  language     = {eng},
  number       = {5},
  pages        = {434--441},
  title        = {Fracture resistance of bone samples filled with fibre-reinforced composite posts: an ex vivo model},
  url          = {http://dx.doi.org/10.1111/iej.12008},
  volume       = {46},
  year         = {2013},
}

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