Avaliação comparativa das propriedades físicas de diferentes tipos de resinas utilizadas na confecção dos attachments ortodônticos

Abstract

Introduction: The objective of this in vitro study was to evaluate the physical properties of different resins used in the fabrication of orthodontic attachments. Methods: Six resins were used in this study: Z350 XT (3M), Transbond XT (3M), Vittra APS Unique (FGM), Filtek Bulk Fill Flow (3M), Orthocem (FGM), and Vitta APS Unique Flow (FGM). Color stability, bond strength, flexural strength, and modulus of elasticity were obtained using a spectrophotometer, the microtensile testing machine OM100, and three-point bending test. The materials were divided into different types of surfaces: Z250 XT composite resin (3M), lithium disilicate (e-max), and bovine enamel. Distilled water and coffee were used as immersion solutions for aging the resins. Data were analyzed using one-way/two-way ANOVA and Tukey tests (α = 0.05). Results: Coffee showed significantly greater color variation than the control solution (P < 0.001). The Vittra APS Unique and Filtek Bulk Fill Flow groups exhibited greater color variation. There was a significant difference between the types of surfaces (p = 0.036). The Z350 XT and Transbond XT groups showed higher flexural strength and modulus of elasticity. Conclusion: The resins were considered above the threshold for visual acceptance with coffee consumption. Filtek Z350 XT and Transbond XT proved to be more effective for the fabrication of orthodontic attachments compared to the other tested resins.