Influence of Printing Orientation on Mechanical Characteristics of NextDent Biocompatible Resin in SLA 3D Printing

The use of 3D printing in dentistry has revolutionized the manufacturing of dental prosthetics and devices. This research focuses on examining the mechanical properties of NextDent dental resins when processed through 3D printing. A variety of mechanical tests, including tensile, fracture, flexural testing, and impact testing are performed on specimens printed using NextDent resins. The thermo-mechanical and thermal behavior of the resin was assessed using Dynamic Mechanical Analysis and Thermogravimetric Analysis testing respectively. The specimens are fabricated at different printing angles, including 0º (vertical), 30º, 60º, and 90º (horizontal), to assess the impact of printing orientation on the mechanical properties. The mechanical properties were found superior at 0º (vertical) followed by 30º 60º & 90º. Fourier-transform infrared spectroscopy (FT-IR) analysis revealed the resin's molecular composition, including C-H, C = C, O-H, N-H, C-N, and C = O stretching and bending vibrations, indicating functional groups, suggesting bromine-containing compounds. DMA test’s result showed a storage modulus of 1575 MPa at room temperature, with a glass transition temperature (Tg) of 107°C, suggesting good damping properties.