In - vitro Flexural Strength Assessment of 3D Printed Custom Resins for Temporary Fixed Dental Restorations

Purpose: The aim of the research was to compare the flexural strength of a 3D printed cylindrical bars manufactured of custom made resins. Methods: Three types of resins: White Resin?, Model Resin? and Dental LT Clear Resin? (FormlabsTM) were combined and mixed in different proportions. The newly created resins were used for 3D printing of a cylindrical test samples. The specimens were subjected to a three - point bending test. Results: The results were compared according the standards ISO 10477 and ISO4049. The samples with higher proportion of Model Resin and Dental LT Clear Resin showed higher flexural strength. Conclusion: The created resins with high proportion of White Resin are suitable for single unit temporary restorations in the frontal area, while these ones with high concentration of Model Resin and Dental LT Clear Resin are appropriate for multiple unit provisional restorations in the distal area due to their good flexural strength and unsatisfactory shade color.