Composite Resin Composition — MFDS Part 1 MCQ
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Correct answer: D — Bisphenol A-glycidyl methacrylate
Option D is correct: Bis-GMA denotes bisphenol A-glycidyl methacrylate, a base monomer used in the organic resin phase of many dental composites. TEGDMA may be incorporated as a co-monomer. The distractors are genuine resin monomers but have different abbreviations: ethoxylated bisphenol A dimethacrylate is Bis-EMA; triethylene glycol dimethacrylate is TEGDMA; urethane dimethacrylate is UDMA; and hydroxyethyl methacrylate is HEMA. Recognising these abbreviations helps distinguish the components of composite and adhesive resin systems.
Reference: Leyva Del Rio D, Johnston WM. Effect of monomer composition and filler fraction on surface microhardness and depth of cure of experimental resin composites. European Journal of Oral Sciences. 2023;131(3):e12933. https://pubmed.ncbi.nlm.nih.gov/37121780/