The influence of elastic moduli of core materials on shear stress distributions at the adhesive interface in resin built-up teeth

Ayaka Chiba, Takashi Hatayama, Kimisuke Kainose, Masatoshi Nakajima, David H. Pashley, Noriyuki Wakabayashi, Junji Tagami

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

This study aimed to investigate shear stress distributions in resin built-up teeth using resin composites of varying elastic moduli (E), with or without fiber posts. Three-dimensional mathematical models of a root-filled mandibular premolar tooth were constructed. Resin post and cores were built-up with resin composites of three different E: 12,000, 18,000 and 24,000 MPa, with or without fiber posts. Finite element linear analysis was performed to calculate shear stress distributions at bonding interface between resin core and dentin. Regardless of fiber post insertion, the shear stress on the cervical surface of resin core decreased as the E of resin composites increased. Insertion of fiber posts increased the shear stress on the post surface of resin core, with increases in the E of resin composites. In conclusion, using resin core materials with higher E decreased the shear stress at cervical interface between resin core and dentin regardless of fiber post insertion.

Original languageEnglish (US)
Article numberdmj/2016-160
Pages (from-to)95-102
Number of pages8
JournalDental Materials Journal
Volume36
Issue number1
DOIs
StatePublished - 2017

Keywords

  • Debonding
  • Elastic modulus
  • Fiber post
  • Finite element analysis
  • Resin composite

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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    Chiba, A., Hatayama, T., Kainose, K., Nakajima, M., Pashley, D. H., Wakabayashi, N., & Tagami, J. (2017). The influence of elastic moduli of core materials on shear stress distributions at the adhesive interface in resin built-up teeth. Dental Materials Journal, 36(1), 95-102. [dmj/2016-160]. https://doi.org/10.4012/dmj.2016-160