Silva, José Sandro Pereira daRodrigues, Yriu Lourenço2018-03-162018-03-162017-09-29RODRIGUES, Yriu Lourenço. Análise biomecânica de diferentes dimensões de próteses temporomandibulares personalizadas: um estudo de elementos finitos. 2017. 57f. Dissertação (Mestrado em Saúde Coletiva) - Centro de Ciências da Saúde, Universidade Federal do Rio Grande do Norte, Natal, 2017.https://repositorio.ufrn.br/jspui/handle/123456789/24890The present study aimed to investigate the biomechanical influence of different dimensions of custom temporomandibular prostheses by means of the Finite Element Method. Frist, a 3D computational model of the mandible was generated using computerized tomography. This model was replicated and its copies were then submitted to three different progressive resections, which were rehabilitated with custom temporomandibular prostheses, thus generating three experimental models (Mandibular Notch Model – MIM, Occlusal Line Model – MLO and 3rd Molar Model – M3M) plus the intact mandible (Control Model – MC). Based on the generated geometries, four models of finite elements were created, aiming to mimic a clinical condition. The models were considered isotropic, homogeneous and linearly elastic. Using virtual simulation software, the actions of the main muscular forces acting on the mandible were reproduced, and analyses of the stress and strain distribution on the adjacent bones of the prosthesis, opposite condyle to the prosthesis, personalized prosthesis, and on fixation screws were performed. It was possible to observe that there was an increase in von Mises equivalent values in the adjacent bones and in the opposing condyles after installation of the prostheses. However, these values remained similar between the models. Stress concentrations in adjacent bones and prostheses occurred in the region around the screws, and the latter had the highest stress peaks ranging from 836 MPa to 13010 MPa. In the strain distribution analysis, it was possible to observe that there was no concentration of strain in the opposing condyles. However, the MIM showed the highest strain peaks in the adjacent bone and prosthesis, whereas the M3M presented the highest strain on the screws, reaching 9770 μԑ. Increasing the dimensions of the customized prostheses led to an increase of the stress peaks and strain at critical values in the bones adjacent to the prostheses and fixation screws which, can compromise the stability and function of the prostheses in all the experimental models. Increasing the number of screws could give adequate stability and stress distribution to the models, especially with the increase of the dimensions of the temporomandibular prosthesis, then requiring more than three fixing screws.Acesso AbertoPrótese temporomandibularAnálise biomecânicaMétodo de elementos finitosmasterThesisCNPQ::CIENCIAS DA SAUDE::SAUDE COLETIVA