Análise das tensões em próteses implantossuportadas esplintadas, variando o tipo de conexão protética e a inclinação do implante: estudo pelo método dos elementos finitos tridimensionais não linear

• Ano de defesa: 2015
• Autor(a) principal: Almeida, Daniel Augusto de Faria [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Implantes dentários; Prótese dentária fixada por implante; Biomecânica; Método dos elementos finitos; Dental implants
• Link de acesso: http://hdl.handle.net/11449/134217; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/29-01-2016/000857939_20201231.pdf

The performance of an osseointegrated dental implant plays important rule for functional longevity of the rehabilitation. Sometimes, anatomical limitations imply in the positioning of tilted implants that is not considered ideal for prosthetic rehabilitation, generating higher stress concentration around it and leading to cortical bone resorption. To solve these situations, the professional must plan carefully the restoration and to study the connection type of the implant to better adaption for these situations. In this way, this study aimed to evaluate the influence of splinting prostheses and implant inclination (0º, 17º and 30º) in implant-supported prostheses in the posterior region of the maxilla on stress distribution by non-linear 3D finite element analysis. For this, twelve 3D models was confectioned using modeling software SolidWorks 2010 and Rhinoceros 4.0 and software InVesalius. The models constituted of 3 dental implants of external hexagon or morse taper (4,0 mm) at the regions: 14 - 10mm; 15 - 8,5 mm; 16 - 8,5 mm, supporting three-unit prostheses in single and splinting configurations. After modeling, the models were imported to pre- and post-processing software of finite elements FEMAP 10.2 for finite element mesh generation and configuration of restrictions and loading conditions. Axial load of 400N and oblique of 200N were applied divided on each cusp tip of occlusal surface. Next step, it was the analysis configuration on FEMAP 10.2 that was exported to NeiNastran 9.2 to math processing. After, the files of results were imported to FEMAP 10.2 to results visualization and post-processing analysis by plotting von Mises and maximum principal stress maps. The results of bone tissue showed higher stress concentration to inclined implants of external hexagon supporting single crowns under oblique loading. The models with splinted Morse taper...