TEGDMA Function — MFDS Part 1 MCQ
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Correct answer: C — Serve as a reactive diluent that lowers matrix viscosity
TEGDMA is a relatively low-viscosity, polymerisable dimethacrylate used as a reactive diluent in the organic resin matrix. It reduces the very high viscosity of Bis-GMA, improving manipulation and monomer mobility; it becomes incorporated into the polymer network during curing. A silane such as an organosilane coupling agent, not TEGDMA, bonds inorganic filler to the resin matrix. Photoinitiation is usually provided by a system such as camphorquinone with a co-initiator. Inhibitors are separate additives used to limit premature polymerisation during storage. Fluoride release depends on fluoride-containing fillers or other phases and is not an intrinsic function of TEGDMA.
Reference: Gonçalves F, Kawano Y, Pfeifer C, Stansbury JW, Braga RR. Influence of BisGMA, TEGDMA, and BisEMA contents on viscosity, conversion, and flexural strength of experimental resins and composites. European Journal of Oral Sciences. 2009;117(4):442–446. https://pubmed.ncbi.nlm.nih.gov/19627357/