title: Finite element analysis to compare stress distribution of connector of lithia disilicate-reinforced glass-ceramic and zirconia-based fixed partial denture.
abstract: This study used finite element method to analyze the stress distribution in connector of ceramic-based bilayer structures, in simulation of dental crown-like structures with a functional but weak veneer layer bonded onto a strong core layer. The purpose of this study was to evaluate the stress distribution at veneer/core interface of 2 different core materials [Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) and lithia disilicate-reinforced glass-ceramic] using three-dimensional finite element analysis. Within the limitations of this study, finite element analysis showed that stress concentrations were located at the veneer/core interface of the connector in Y-TZP core models. The general observation was that compared with Y-TZP, lithia disilicate-reinforced glass-ceramic showed a relatively stable stress value and had a minor effect on the stress concentration susceptibility.
authors.affiliation: Department of Crown and Bridge, The Nippon Dental University School of Life Dentistry at Tokyo, 1-9-20 Fujimi, Chiyoda-ku, Tokyo, 102-8159, Japan.
authors.forename: Jie
authors.initials: J
authors.lastname: Lin
authors.forename: Akikazu
authors.initials: A
authors.lastname: Shinya
authors.forename: Harunori
authors.initials: H
authors.lastname: Gomi
authors.forename: Akiyoshi
authors.initials: A
authors.lastname: Shinya
mesh_terms: D003198:Computer Simulation; D003776:Dental Porcelain; D003799:Dental Stress Analysis / Q000379:methods*; D003801:Dental Veneers; D003779:Denture Design; D003830:Denture, Partial, Fixed; D020342:Finite Element Analysis; D006801:Humans; D015019:Yttrium; D015040:Zirconium
chemical_list: C493120:lithia disilicate; C499362:yttria stabilized tetragonal zirconia; D003776:Dental Porcelain; D015019:Yttrium; D015040:Zirconium