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Information Journal Paper

Title

MONOMER RELEASE FROM NANOFILLED AND MICROHYBRID DENTAL COMPOSITES AFTER BLEACHING

Pages

  56-66

Abstract

 Objective: The aim of this study was to assess the effect of BLEACHING on elution of monomers from nanofilled and microhybrid composites.Materials and Methods: 80 samples (5mm diameter and 3mm thickness) of each composite were prepared. After curing, half of them were randomly polished. Each group was divided into 8 subgroups and immersed in water or 10%, 20% and 30% H2O2 for 3 or 8 hours. Eluted Bis-GMA (Bis-phenol A Glycidyl Dimethacrylate), TEGDMA (Triethyleneglycol Dimethacrylate), UDMA (Urethane Dimethacrylate) and BisEMA (Bis-phenol A ethoxylate Dimethacrylate) were quantified by high performance liquid CHROMATOGRAPHY and the results were analyzed by univariate ANOVA and t-test (P<0.05).Results: Bleach significantly increased the overall release of monomers (P<0.001); TEGDMA was released more than Bis-GMA (P<0.001). Supreme released more TEGDMA compared to Z250 (P<0.001). BLEACHING increased the release of this monomer (P<0.001). Increasing both the concentration of H2O2, and the immersion time, increased the release of TEGDMA (P<0.001). Polishing had no effect on release of this monomer (P=0.952). Supreme released more Bis-GMA than Z250 (P=0.000). The more concentrated H2O2 caused more elution of Bis-GMA (P= 0.003); while the effect of immersion time was not significant (P=0.824). Polishing increased the release of Bis-GMA (P=0.001). Neither the type of composite nor BLEACHING had any effect on release of UDMA (P=0.972) and (P=0.811) respectively. Immersion duration increased the release of UDMA (P=0.002), as well as polishing (P=0.024).Conclusion: BLEACHING increased the release of monomers. Nanofilled composites re-leased more monomer than the microfilled.

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    APA: Copy

    HASANI TABATABAEE, MASUMEH, ARAMI, SAKINEH, GHAVAM, MARYAM, & REZAII, ASIEH. (2014). MONOMER RELEASE FROM NANOFILLED AND MICROHYBRID DENTAL COMPOSITES AFTER BLEACHING. FRONTIERS IN DENTISTRY (JOURNAL OF DENTISTRY OF TEHRAN UNIVERSITY OF MEDICAL SCIENCES), 11(1), 56-66. SID. https://sid.ir/paper/298093/en

    Vancouver: Copy

    HASANI TABATABAEE MASUMEH, ARAMI SAKINEH, GHAVAM MARYAM, REZAII ASIEH. MONOMER RELEASE FROM NANOFILLED AND MICROHYBRID DENTAL COMPOSITES AFTER BLEACHING. FRONTIERS IN DENTISTRY (JOURNAL OF DENTISTRY OF TEHRAN UNIVERSITY OF MEDICAL SCIENCES)[Internet]. 2014;11(1):56-66. Available from: https://sid.ir/paper/298093/en

    IEEE: Copy

    MASUMEH HASANI TABATABAEE, SAKINEH ARAMI, MARYAM GHAVAM, and ASIEH REZAII, “MONOMER RELEASE FROM NANOFILLED AND MICROHYBRID DENTAL COMPOSITES AFTER BLEACHING,” FRONTIERS IN DENTISTRY (JOURNAL OF DENTISTRY OF TEHRAN UNIVERSITY OF MEDICAL SCIENCES), vol. 11, no. 1, pp. 56–66, 2014, [Online]. Available: https://sid.ir/paper/298093/en

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