Stress distribution of complete-arch implant-supported prostheses reinforced with silica-nylon mesh

Abstract

Background: This study evaluated the presence of a silica-nylon mesh and two cantilever lengths on the biomechanical behavior of complete-arch implant-supported prostheses. Material and Methods: Twenty-four (24) complete mandibular arch implant-supported prostheses were divided into 4 groups according to the presence of reinforcing mesh (with or without) and the cantilever length (molar -15 mm or premolar -5 mm). The specimens were submitted to strain gauge analysis (30-kgf, 10 s) at different points (molar and premolar). Three-dimensional models were created based on the in vitro specimens, and the results in the bone (microstrain), prostheses (tensile stress), implants and prosthetic screws (von-Mises stress) were evaluated using the finite element method (FEM). All materials were considered homogeneous, isotropic and linear. Strain gauge data were submitted to 3-way analysis of variance and the Tukey test (α=.05). FEM results were qualitatively analyzed using colorimetric graphs. Results: The microstrain magnitude for the prostheses with reinforcement was 519.91±359 and 583.33±661 without reinforcement (p=.001). The microstrain values for loading on the molar was 867.49±784 and on the premolar was 235.75±145. FEM corroborated with the in vitro findings for the bone behavior. The load application in the premolar showed reduced stress concentration, and a significant difference was observed between the presence or absence of the reinforcement for the prostheses.

Comparison of CAD-CAM and traditional chairside processing of 4-unit interim prostheses with and without cantilevers: Mechanics, fracture behavior, and finite element analysis

“…20,22 The finite element analysis in the present study was consistent with the findings reported in the literature once the stress concentration took place over the occlusal contacting surface and at the connector regions. 25,26 Additionally, previous studies reported that the presence of filler-reinforcement improved the stress distribution through the prostheses. 25 In the present study, the FEA results were consistent with the fracture analyses by FEGSEM.…”

“…25,26 Additionally, previous studies reported that the presence of filler-reinforcement improved the stress distribution through the prostheses. 25 In the present study, the FEA results were consistent with the fracture analyses by FEGSEM. Regions of fractures were detected mainly in the transition region between pontics, at thin regions, and at the cantilever.…”

Mechanical Response of PEKK and PEEK As Frameworks for Implant-Supported Full-Arch Fixed Dental Prosthesis: 3D Finite Element Analysis

“…Next, previously modeled 22 morse taper internal connection implants (10 × 4.1 mm) were selected ( Fig. 1C ).…”

Graphene-Doped Polymethyl Methacrylate (PMMA) as a New Restorative Material in Implant-Prosthetics: In Vitro Analysis of Resistance to Mechanical Fatigue

“…In order to avoid this problem, the addition of reinforcing materials to the main structure has been proposed, including metal beams, the incorporation of fibers and glass meshes, silica, carbon, polyamide, etc., [ 10 , 11 , 12 , 13 ]. One such reinforcing material is graphene, added to the composition of the PMMA discs in the form of small amounts of graphene particles.…”