Triethylene glycol dimethacrylate (TEGDMA) is commonly used in polymer resin-based dental materials. This projected investigated molecular mechanisms of TEGDMA toxicity by identifying time- and dose dependent effects on the proteome of human THP-1 monocytes. Effects of different concentrations (0.07mM-5mM) and exposure times (0-72h) of TEGDMA on cell viability, proliferation, and morphology were determined by a real-time viability assay, automated cell counting, and electron microscopy, and laid the fundament for choice of exposure scenarios in the proteomic experiments. Cells were metabolically labelled (SILAC), and exposed to 0.3mM or 2.5mM TEGDMA for 6h or 16h prior to LC-MS/MS analyses. Regulated proteins were analysed with the STRING database. Cells exposed to 0.3mM TEGDMA showed increased viability, and time-dependent upregulation of proteins associated with stress/oxidative stress, autophagy, and cytoprotective functions. Cells exposed to 2.5mM TEGDMA showed diminished viability, and a protein expression profile associated with oxidative stress, DNA-damage, mitochondrial dysfunction and cell-cycle inhibition. Altered expression of immune genes was observed in both groups.