Tensile stress distribution in maxillary central incisors restored with cast-made and prefabricated dental posts.

  • Ahmed A Madfa Department of Conservative Dentistry, Faculty of Dentistry. Thamar University. Restorative and Prosthodontic Department, Collage of Dentistry. University of Science and Technology.
  • Elham M Senan Restorative and Prosthodontic Department, Collage of Dentistry. University of Science and Technology.
  • Xiao-Guang Yue Department of Safety Science and Engineering. Wuhan University.

Abstract

Abstract: Aim: To analyze and compare the tensile stress distribution in endodontically treated teeth restored with cast-made (Ni-Cr and gold) and prefabricated (titanium and glass fibre) dental posts. Methodology: Four three-dimensional finite element (FE) models of a maxillary central incisor restored with Ni-Cr cast-made (Model Ni-Cr), gold cast-made (Model GO), prefabricated titanium (Model TI) and prefabricated glass fibre (Model FP) posts were constructed. An oblique loading of 100N was applied to each three-dimensional model. Tensile stress distribution within the root dentine and at the post and surrounding structure interfaces were analysed. Results: In all the FE models studied, a higher magnitude of tensile stresses was observed on the palatal aspect of the cervical dentin as compared to the labial aspect and progressively decreases from the outer to the inner part of the root. The gold cast-made and glass fibre post models showed significantly less tensile stress concentration in the post-core component than the other experimental models. The maximum tensile stress was seen on the palatal aspect of the Ni-Cr compared to other posts. The higher magnitude interfacial tensile stress concentration was observed in a pulpless tooth restored with a Ni-Cr cast-made post, followed by titanium and gold cast-made posts, respectively. However, the minimum interfacial tensile stress was noticed in a pulpless tooth restored with a glass fibre post. Conclusion: Glass fibre posts tend to transfer tensile stress more homogenously within the tooth and at interfaces than the other types of investigated posts.

Author Biography

Ahmed A Madfa, Department of Conservative Dentistry, Faculty of Dentistry. Thamar University. Restorative and Prosthodontic Department, Collage of Dentistry. University of Science and Technology.

Editor de Journal of Oral Research.

Asesor en Metodología de la Investigación.

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Published
2017-09-22
How to Cite
MADFA, Ahmed A; SENAN, Elham M; YUE, Xiao-Guang. Tensile stress distribution in maxillary central incisors restored with cast-made and prefabricated dental posts.. Journal of Oral Research, [S.l.], v. 6, n. 9, p. 237-244, sep. 2017. ISSN 0719-2479. Available at: <https://www.joralres.com/index.php/JOralRes/article/view/joralres.2017.068>. Date accessed: 28 mar. 2024. doi: https://doi.org/10.17126/joralres.2017.068.
Section
Articles

Keywords

finite element analysis; post materials; biomechanics; tensile stress.