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Monomer release from nanofilled and microhybrid dental composites after bleaching.
| Content Provider | Europe PMC |
|---|---|
| Author | Tabatabaee, Masumeh Hasani Arami, Sakineh Ghavam, Maryam Rezaii, Asieh |
| Copyright Year | 2014 |
| 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 released more monomer than the microfilled. |
| Related Links | https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC4037267&blobtype=pdf |
| ISSN | 17352150 |
| Journal | Journal of Dentistry (Tehran, Iran) [J Dent (Tehran)] |
| Volume Number | 11 |
| PubMed Central reference number | PMC4037267 |
| Issue Number | 1 |
| PubMed reference number | 24910677 |
| e-ISSN | 20082185 |
| Language | English |
| Publisher | Tehran University of Medical Sciences |
| Publisher Date | 2014-01-31 |
| Access Restriction | Open |
| Rights License | This is an open-access article distributed under the terms of the Creative Commons Attribution NonCommercial 3.0 License (CC BY-NC 3.0), which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly. Copyright © Dental Research Center, Tehran University of Medical Sciences |
| Subject Keyword | Monomer elution Dental composites Chromatography Bleaching |
| Content Type | Text |
| Resource Type | Article |
| Subject | Dentistry |
