@article{Presotto_Bhering_Caldas_Consani_Barão_Mesquita_2018, place={Limeira, SP}, title={Photoelastic and finite element stress analysis reliability for implant-supported system stress investigation}, volume={17}, url={https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8652941}, DOI={10.20396/bjos.v17i0.8652941}, abstractNote={<strong>Aim:</strong> To compare the reliability between photoelastic and finite element (FE) analyses by evaluating the effect of different marginal misfit levels on the stresses generated on two different implant-supported systems using conventional and short implants. <strong>Methods:</strong> Two photoelastic models were obtained: model C with two conventional implants (4.1×11 mm); and model S with a conventional and a short implant (5×6 mm). Three-unit CoCr frameworks were fabricated simulating a superior first pre-molar (P) to first molar (M) fixed dental prosthesis. Different levels of misfit (µm) were selected based on the misfit average of 10 frameworks obtained by the single-screw test protocol: low (<20), medium (>20 and <40) and high (>40). Stress levels and distribution were measured by photoelastic analysis. A similar situation of the <em>in vitro</em> assay was designed and simulated by the <em>in silico</em> analysis. Maximum and minimum principal strain were recorded numerically and color-coded for the models. Von Mises Stress was obtained for the metallic components. <strong>Results:</strong> Photoelasticity and FE analyses showed similar tendency where the increase of misfit generates higher stress levels despite of the implant design. The short implant showed lower von Mises stress values; however, it presented stresses around its full length for the <em>in vitro</em> and <em>in silico</em> analysis. Also, model S showed higher µstrain values for all simulated misfit levels. The type of implant did not affect the stresses around pillar P. <strong>Conclusions: </strong>Photoelasticity and FEA are reliable methodologies presenting similarity for the investigation of the biomechanical behavior of implant-supported rehabilitations.}, journal={Brazilian Journal of Oral Sciences}, author={Presotto, Anna Gabriella Camacho and Bhering, Cláudia Lopes Brilhante and Caldas, Ricardo Armini and Consani, Rafael Leonardo Xediek and Barão, Valentim Adelino Ricardo and Mesquita, Marcelo Ferraz}, year={2018}, month={Jul.}, pages={e181097} }