Análise da distribuição das tensões em prótese de três elementos unidas implantossuportadas com diferentes tipos de conexões: análise fotoelástica e extensométrica

• Autor(a) principal: Barros, Rafael de [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/156601; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-06-12/000900146.pdf
• topic: Implantes dentários; Biomecânica; Prótese dentária fixada por implante; Dental implants

It is known that many failures and clinical complications in implant-supported prosthetic rehabilitation can be caused by the abutment/implant connection system, so it is very important to choose it correctly. The objective of this study was to evaluate the biomechanical behavior of three - element implant prostheses with different types of connections, external hexagon (EH) and morse taper (MT), using photoelastic analysis (PA) and extensometric analysis (EA) Submitted to different occlusal loads (axial and oblique). The specimens were divided into two groups of 01 specimen each for PA (photoelastic resin PL-2) and two groups of 05 specimens each for AE (polyurethane F160). For each group, a 3-element prosthesis was made on two 11.5x4 mm implants (DSP Biomedical). For PA, the photoelastic model/implant/prosthesis assembly was positioned in a circular polariscope associated with a universal test machine (EMIC), loads of 100 N were applied in axial and oblique (45°) directions. The tensions generated in the test were recorded photographically and analyzed qualitatively. For AE, 2 strain gauges were positioned on the mesial and distal of each implant and the electrical signals picked up by a data acquisition device (ASD2001). Data were submitted to ANOVA and Tukey's test (α = 0.05). In the axial load, all groups presented similar numbers of high intensity fringes and there was tension increase in all groups in the oblique load. For EA, in the axial load, there was no statistical difference between the connection systems (p> .05). In the oblique load, the external hexagon system presented the lowest values of stress (microstrains) and morse taper system the highest values. There was a statistically significant difference between both (p <.05). In both types of occlusal loads, there was a direct influence on the voltage distribution in the tested connection systems