Comparison of Microhardness According to the Layered Thickness of 3D Printing Resin

다국어 초록 (Multilingual Abstract)

Objective: This study aims to evaluate the microhardness differences of currently clinically used light-curable 3D printing resins at different deposition thicknesses to provide meaningful information for the fabrication of temporary restorations using 3D printing resins.
Methods: Specimens with four different laminate thicknesses (0.010, 0.050, 0.075, and 0.150) of light-curable 3D printing resin were produced according to the manufacturer's manual, and the microhardness was measured and compared using a Vickers hardness tester.
Results: The microhardness of the resins varied depending on the deposition thickness. The average value of the microhardness of the photocurable 3D printing resin was 293.087 for 0.010, 237.307 for 0.050, 214.240 for 0.075, and finally 180.867 for 0.150, indicating that the microhardness of the resin was lower for thicker layers, and there was no statistically significant difference between 0.050 and 0.075.
Conclusion: Based on the above results, it appears that the build-up thickness of light-curable 3D printing resins does not have a significant impact on their fabrication and use in temporary restorations, but the higher the build-up thickness, the more disadvantageous their application as temporary restorations.