Effect of post length on endodontically treated teeth: fracture resistance

  • Jefferson Ricardo Pereira University of South of Santa Catarina
  • Accácio Lins do Valle University of São Paulo
  • Talita Magro Juvêncio University of Sao Paulo
  • Janaina Salomon Ghizoni University of South of Santa Catarina
  • Marcus Vinícius de Reis Só Federal University of Rio Grande do Sul
Keywords: Post and core technique, Composite resin, Fracture strength

Abstract

Aim: This study compared the fracture resistance of endodontically treated teeth restored with posts and cores systems with different post lengths. Methods: Sixty extracted intact canines were randomly divided in 6 groups of 10 teeth each, as follows: groups 1, 2 and 3 were restored with custom cast post-and-core, and groups 4, 5 and 6 were restored with prefabricated post and composite resin core, with different post lengths (5.0, 7.5 and 10 mm, respectively). A compressive load was applied at a 45-degree angle to the long axis until failure occurred. Results: Two-way analysis of variance (á=0.05) showed statistically significant difference between the groups (p<0.001). However, when the mean fracture forces for the groups were compared (group 1: 254.4 N; groups 2, 3, 4, 5, 6 – 331.7 N, 434.7 N, 405.4 N, 395.6 N and 393.8 N, respectively), no significant differences could be detected among the three groups restored with prefabricated post and group 3. Conclusions: This study showed that an increased post length in teeth restored with prefabricated posts does not significantly increase the fracture resistance of endodontically treated teeth. On the other hand, endodontically treated teeth restored with custom cast-post and core showed significant increase on fracture resistance when the post length is increased.

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Author Biographies

Jefferson Ricardo Pereira, University of South of Santa Catarina
DDS, MSc, PhD, Department of Prosthodontics, Dental School, University of South of Santa Catarina
Accácio Lins do Valle, University of São Paulo
DDS, MSc, PhD, Department of Prosthodontics, Bauru Dental School, University of São Paulo
Talita Magro Juvêncio, University of Sao Paulo
DDS, Department of Prosthodontics, Bauru Dental School, University of Sao Paulo
Janaina Salomon Ghizoni, University of South of Santa Catarina
DDS, MSc, PhD, Department of Periodontology, Dental School, University of South of Santa Catarina
Marcus Vinícius de Reis Só, Federal University of Rio Grande do Sul
DDS, MSc, PhD, Department of Endodontics, Dental School, Federal University of Rio Grande do Sul
Published
2015-11-18
How to Cite
Pereira, J. R., Valle, A. L. do, Juvêncio, T. M., Ghizoni, J. S., & Só, M. V. de R. (2015). Effect of post length on endodontically treated teeth: fracture resistance. Brazilian Journal of Oral Sciences, 9(3), 371-375. https://doi.org/10.20396/bjos.v9i3.8641800
Section
Article

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