Dentistry Commons^™

Effects Of Dental Composite Resin Monomers On Dental Pulp Cells, Thomas R. Schneider, Roxan Hakami-Tafreshi, Alexandra Tomasino-Perez, Lobat Tayebi, Doug Lobner

School of Dentistry Faculty Research and Publications

Methacrylate monomers found in many dental materials cause toxicity to dental pulp cells but the mechanism of the toxicity is poorly understood. We used cultured human dental pulp cells to test the effects of three commonly used monomers; bisphenol-A-glycidyl methacrylate (Bis-GMA), urethane dimethacrylate (UDMA), and triethyleneglycol dimethacrylate (TEGDMA). The order of toxicity was Bis-GMA>UDMA>TEGDMA. The toxicity correlated inversely with cystine uptake, with TEGDMA stimulating uptake and BisGMA and UDMA inhibiting uptake. Bis-GMA and UDMA induced oxidative stress, while TEGDMA did not. Toxicity correlated poorly with glutathione levels, as all compounds decreased cellular glutathione. TEGDMA is less toxic than …