Abstract
To produce radiopaque silica (SiO2)-based fillers, zirconia (ZrO2) powders were mechanically added to SiO2 powders with ZrO2 content up to 40 wt%. We evaluated the radiopacity of experimental composite resins consisting of (Bis-GMA + TEGDMA + CQ + DMAEMA) monomer mixture (25 wt%) and admixed SiO2−ZrO2 fillers (75 wt%), and compared their radiopacity with those of human dentin and enamel. It became confirmed that the radiopacity of experimental composite resins increased linearly with zirconium content, while the composite resin containing 80 wt% SiO2-20 wt% ZrO2 filler possessed radiopacity similar to that of human enamel. It was proved that the radiopacity of the composites could be precisely controlled by adjusting ZrO2 content in SiO2−ZrO2 fillers.
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Taira, M., Toyooka, H., Miyawaki, H. et al. Studies on the radiopacity of experimental dental composite resins containing admixed SiO2−ZrO2 fillers. J Mater Sci: Mater Med 6, 5–7 (1995). https://doi.org/10.1007/BF00121238
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DOI: https://doi.org/10.1007/BF00121238