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Atualmente, os implantes sao utilizados em diversos tipos de tratamento na reabilitacao oral. Para manutencao da osseointegracao, e essencial que o conjunto protese/implante/osso seja submetido a forcas as quais estejam aptos a suportar. Os diferentes tipos de desadaptacoes das infraestruturas das proteses sobre implantes sao fatores que podem contribuir para o aumento das tensoes na regiao peri-implantar. Este estudo teve como objetivo avaliar a influencia das desadaptacoes angulares unilaterais na distribuicao de tensoes na regiao periimplantar de pilares tipo UCLA, no momento da pre-carga e carga axial. Infraestruturas de CoCr, confeccionadas utilizando-se pilares tipo UCLA, foram divididas em quatro grupos: Grupo A (adaptado), Grupo B, Grupo C e Grupo D (50, 100 e 200 μm de desadaptacao unilateral angular por vestibular, respectivamente). Cada grupo foi representado por quatro infraestruturas (n=4). Quatro implantes (4.1mm/15mm) foram posicionados em uma matriz metalica, onde posteriormente foi vazado o poliuretano (PU), com funcao de simular o tecido osseo. Quatro extensometros (strain gauges) foram posicionados na regiao vestibular, distal, lingual e mesial de cada implante, para aferir a quantidade de deformacao; cada grupo foi posicionado em seu respectivo implante. Foram realizados dois testes: o teste de pre-carga com um torque de 32Ncm e o teste de carga com uma forca axial estatica de 300N. Cada infraestrutura foi sujeita aos dois testes, por cinco vezes. Para analise estatistica dos dados, foram utilizados ANOVA (dois criterios) e o teste de Tukey (p Nowadays implants are used in several kinds of oral rehabilitation treatments. For the osseointegration maintenance it is important that crow/implant/bone are subjected to forces which are able to withstand. Different kinds of misfit on the crown frameworks are factors that could lead to an increase of strain around the implanted bone. This study aimed to evaluate the influence of the unilateral angular misfit in frameworks made of UCLA on the peri-implant strain distribution, subjected to preload and axial load. Frameworks made of chrome-cobalt were fabricated on UCLA abutments and divided in 4 groups: Group A (no misfit), Group B, Group C, Group D (50, 100, and 200 of unilateral angular misfit by buccal side, respectively). Each group was represented for 4 frameworks (n=4). Four implants (4.1mm/15mm) were positioned in a metallic matrix which was subsequently poured the polyurethane (PU) to simulate the bone. Four strain gauges were positioned on the buccal, distal, lingual and mesial sides of each implant to assess the amount of strain, each group was connected on its respectively implant. It was performed 2 tests: the preload test with a 32Ncm torque and the load test by applying an axial force of 300N. Each framework was subjected to the both test five times. To the statistics analysis ANOVA (2 ways) and Turkeys test were performed. The results showed that the Groups A and B presented less deformation when compared to Groups C and D. The statistics also showed that the Group A presented better distribution of strain on its peri-implant bone when compared to the other three groups (p

Influência das desadaptações angulares unilaterais na distribuição de tensões da região peri-implantar de elementos unitários tipo UCLA submetidos a pré-carga e carga axial: estudo in vitro