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Nanoscale and Microscale Hardness of Hydroxyapatite – BisGMA/TEGDMA Composites

  • Jesse E. Thompson (a1), Jessica D. Kaufman (a2) and David S. Lee (a1)

Abstract

We have investigated BisGMA-TEGDMA dental composites with varying mass fractions of hydroxyapatite and silica filler. Commercially available dental composites with 60% silica filler were synthesized in the presence of nanometer-sized hydroxyapatite crystals. We have compared the mechanical properties of BisGMA-TEGDMA samples filled with silica only and those filled with silica and hydroxyapatite particles. We report on hardness as a function of crystalline content as determined by nanoindentation and microindentation.

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