Nonlinear visco-elastic finite element analysis of different porcelain veneers configuration

Roberto Sorrentino, Davide Apicella, Carlo Riccio, Enrico Gherlone, Fernando Zarone, Raffaella Aversa, Franklin Garcia-Godoy, Marco Ferrari, Antonio Apicella

Research output: Contribution to journalArticle

Abstract

This study is aimed at evaluating the biomechanical behavior of feldspathic versus alumina porcelain veneers. A 3D numerical model of a maxillary central incisor, with the periodontal ligament (PDL) and the alveolar bone was generated. Such model was made up of four main volumes: dentin, enamel, cement layer and veneer. Incisors restored with alumina and feldspathic porcelain veneers were compared with a natural sound tooth (control). Enamel, cementum, cancellous and cortical bone were considered as isotropic elastic materials; on the contrary, the tubular structure of dentin was designed as elastic orthotropic. The nonlinear visco-elatic behavior of the PDL was considered. The veneer volumes were coupled with alumina and feldspathic porcelain mechanical properties. The adhesive layers were modeled in the FE environment using spring elements. A 50N load applied at 60o angle with tooth longitudinal axis was applied and validated. Compressive stresses were concentrated on the external surface of the buccal side of the veneer close to the incisal margin; such phenomenon was more evident in the presence of alumina. Tensile stresses were negligible when compared to compressive ones. Alumina and feldspathic ceramic were characterized by a different biomechanical behavior in terms of elastic deformations and stress distributions. The ultimate strength of both materials was not overcome in the performed analysis.

Original languageEnglish
Pages (from-to)727-736
Number of pages10
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume91
Issue number2
DOIs
Publication statusPublished - Nov 2009

Keywords

  • Alumina
  • Feldspathic ceramic
  • Finite element analysis
  • Prosthodontics
  • Veneer

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

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