TY - JOUR AU - Braz, Rodivan AU - Sinhoreti, Mário Alexandre Coelho AU - Spazzin, Aloísio Oro AU - Loretto, Sandro Cordeiro AU - Lyra, Arine Maria Viveros de Castro AU - Meira Júnior, Agenor Dias de PY - 2015/11/16 Y2 - 2024/03/29 TI - Shear bond strength test using different loading conditions – a finite element analysis JF - Brazilian Journal of Oral Sciences JA - Braz. J. Oral Sci. VL - 9 IS - 4 SE - Article DO - 10.20396/bjos.v9i4.8641727 UR - https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641727 SP - 439-442 AB - Aim: This study evaluated the stress distribution at the bond interface during shear bond strength testing for three loading conditions. Methods: A three-dimensional model was created of a specimen for evaluation by the shear bond strength test, using three cylindrical volumes representing the dentin, adhesive system and composite resin. A linear analysis was performed to calculate the stress distribution at the dentin-adhesive interface. Three models simulating different loading conditions were prepared: chisel, orthodontic-looped wire and stainless steel tape. Results: Chisel presented severe stress concentrations near the loading site (-10681 to 637 MPa). Wire presented stress concentrations along the radial loading axis (-382 to 216 MPa). Tape presented more uniform stress distribution (-83 to 21 MPa). Conclusions: The loading with stainless steel tape allowed more uniform stress distribution at the bond interface, and was a more reliable way to evaluate the bond with regard to the aim of the shear bond strength test. ER -