Document Type
Article
Publication Date
7-2019
Publisher
Japanese Society for Dental Materials and Devices
Source Publication
Dental Materials Journal
Source ISSN
0287-4547
Abstract
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 Bis-GMA and UDMA likely because it stimulates cystine uptake and does not induce oxidative stress, the enhanced uptake of cystine appears to compensate for TEGDMA’s direct interaction with glutathione. Bis-GMA and UDMA both deplete glutathione and inhibit cystine uptake leading to oxidative stress and cell death.
Recommended Citation
Schneider, Thomas R.; Hakami-Tafreshi, Roxan; Tomasino-Perez, Alexandra; Tayebi, Lobat; and Lobner, Doug, "Effects of Dental Composite Resin Monomers on Dental Pulp Cells" (2019). School of Dentistry Faculty Research and Publications. 372.
https://epublications.marquette.edu/dentistry_fac/372
Comments
Published version. Dental Materials Journal, Vol. 38, No. 4 (July 2019): 579-583. DOI. © 2019 The Japanese Society for Dental Materials and Devices. Used with permission.