Autor(es):
de A. Paes, Tarcisio-José [UNESP] ; Tribst, João-Paulo-Mendes [UNESP] ; de Oliveira Dal Piva, Amanda-Maria [UNESP] ; Amaral, Marina ; Alexandre-Luiz-Souto Borges, [UNESP] ; de-Cássia-Papaiz Gonçalves, Fernanda
Data: 2020
Identificador Persistente: http://hdl.handle.net/11449/198742
Origem: Oasisbr
Assunto(s): Biomechanical response; Dental implants; Finite element analysis; Prosthetic dentistry; Biomechanical response; Biomechanical response; Dental implants; Dental implants; Finite element analysis; Finite element analysis; Prosthetic dentistry; Prosthetic dentistry
Descrição
Made available in DSpace on 2020-12-12T01:20:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01
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. Conclusions: Silica-nylon mesh reduced the peri-implant microstrain and the prosthesis stress regardless of the cantilever extension. For temporary complete-arch implant-supported prostheses, the limitation of the cantilever to the premolar region improves the biomechanical response during load application.
Department of Dental Materials and Proshodontics São Paulo State University (Unesp) Institute of Science and Technology
Department of Dentistry (Prosthethic Dentistry) University of Taubaté (Unitau)
Department of Prosthodontics Brazcubas Education
Department of Dental Materials and Proshodontics São Paulo State University (Unesp) Institute of Science and Technology
