title: Three-dimensional finite element analysis of posterior fiber-reinforced composite fixed partial denture Part 2: influence of fiber reinforcement on mesial and distal connectors.
abstract: The aim of this study was to evaluate the influence of connectors under two different loading conditions on displacement and stress distribution generated in isotropic hybrid composite fixed partial denture (C-FPD) and partially anisotropic fiber-reinforced hybrid composite fixed partial denture (FRC-FPD). To this end, two three-dimensional finite element (FE) models of three-unit FPD from mandibular second premolar to mandibular second molar - intended to replace the mandibular first molar - were developed. The two loading conditions employed were a vertical load of 629 N (applied to eight points on the occlusal surface) and a lateral load of 250 N (applied to three points of the pontic). The results suggested that the reinforcing fibers in FRC framework significantly improved the rigidity of the connectors against any twisting and bending moments induced by loading. Consequently, maximum principal stress and displacement generated in the connectors of FRC-FPD were significantly reduced because stresses generated by vertical and lateral loading were transferred to the reinforcing fibers.
authors.affiliation: Department of Crown and Bridge, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan.
authors.forename: Nobuhisa
authors.initials: N
authors.lastname: Aida
authors.forename: Akikazu
authors.initials: A
authors.lastname: Shinya
authors.forename: Daiichiro
authors.initials: D
authors.lastname: Yokoyama
authors.forename: Lippo V J
authors.initials: LV
authors.lastname: Lassila
authors.forename: Harunori
authors.initials: H
authors.lastname: Gomi
authors.forename: Pekka K
authors.initials: PK
authors.lastname: Vallittu
authors.forename: Akiyoshi
authors.initials: A
authors.lastname: Shinya
mesh_terms: D001732:Bite Force; D003188:Composite Resins; D003198:Computer Simulation; D000044:Dental Abutments; D003764:Dental Materials; D003799:Dental Stress Analysis / Q000379:methods*; D003779:Denture Design; D003781:Denture Retention; D003830:Denture, Partial, Fixed; D020342:Finite Element Analysis; D005898:Glass; D006801:Humans; D021621:Imaging, Three-Dimensional; D008334:Mandible; D008962:Models, Theoretical; D013314:Stress, Mechanical
chemical_list: D003188:Composite Resins; D003764:Dental Materials; C009753:fiberglass