Comparison of Compression of Occlusal Splint Materials: Laboratory Mechanical Analysis

Objective: To perform a compression test to fill the gap in the literature, assess the change in the construction angle (0º, 45º, 90º) as well as investigate physical and microstructural characteristics. Theoretical Framework: Comparisons of compression tests of occlusal splint materials printed in 3D are not described in the literature, which makes informed decision making on the choice of materials complicated. Method: The materials printed in 3D using the SLA method were resins. After printing, the materials were submitted to compression (calculating the Poisson coefficient), shore hardness and density tests. Results and Discussion: Dima® Print Ortho achieved the best results in terms of compression strength and maximum deformation in the vertical position (90º) in comparison to the other materials, followed by Self BioPrint Splint Hard, PriZma 3D Bio Splint and Cosmos Splint. Research Implications: Three-dimensional devices through additive fabrication can be used in the treatment of bruxism. The position to obtain greater compression strength is vertically at 90º. Originality/Value: This study contributes to the literature by demonstrating the efficacy of 3D printing of occlusal devices using the resin polymerization method, highlighting the superior dimensional accuracy and mechanical properties of the materials employed. Furthermore, it addresses the sustainability of the process by promoting material waste reduction during fabrication. These findings have significant implications for optimizing the production of occlusal devices in clinical settings.