Effect of print orientation on sorption, solubility, and monomer elution of 3D printed resin restorative materials

Sorption, solubility, and monomer elution were more influenced by the type of material than the printing orientation. Definitive 3D printed materials demonstrated less sorption, solubility, and monomer elution compared with the interim 3D printed materials. All 3D printed resins had greater amounts of eluted residual monomers compared with the milled resin block LU. The 3D printed resins primarily eluted bisphenol A ethoxylate dimethacrylate (bis-EMA) and urethane dimethacrylate (UDMA) monomers, with all concentrations remaining below the cytotoxic levels established in previous studies.