Comprehensive Performance Evaluation of DLP 3D Printing Composite Resin Based on Different Proportions of UDMA/DMSO/TMO System

초록

This study investigated the effects of varying ratios of urethane dimethacrylate (UDMA), dimethyl sulfoxide (DMSO), and (2,4,6-trimethylbenzoyl) bis(p-tolyl) phosphine oxide (TMO) on the performance of dental 3D-printing resins fabricated via digital light processing (DLP). Thirteen resin formulations were printed and evaluated for viscosity, degree of conversion, water sorption, solubility, water contact angle, dimensional stability, color stability, flexural strength, modulus, hardness, and cytotoxicity. Viscosity increased with the ratio of UDMA/(UDMA+DMSO), ranging from 187.1 to 2997.3 mPa & centerdot;s, while the degree of conversion remained high (77.0%-88.1%) with no significant differences. Water sorption, solubility, and contact angle all increased with higher DMSO content. Dimensional stability improved with increased of the UDMA/(UDMA+DMSO). And all groups exhibited great color stability, with Delta E-00 values below 4.1 for nearly all groups on a white background. Flexural strength, modulus and hardness also rose with the ratio of UDMA/(UDMA+DMSO). All formulations demonstrated cell viability exceeding 70%, indicating that there was no cytotoxicity. In summary, we focused on the effects of UDMA, DMSO and TMO ratios on the properties of the specimens and analyzed the trends of the properties with different ratios. We expect that this study will provide a fundamental basis for optimizing materials suitable for clinical dental applications. [GRAPHICS]

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