Fabrication And Evaluation Of Dental Resin Composites Developed From Bis-Gma/Tegdma With Treated Ceramic Fillers
| dc.contributor.author | Alsharif, Saad Omar | |
| dc.date.accessioned | 2016-05-17T01:35:02Z | |
| dc.date.available | 2016-05-17T01:35:02Z | |
| dc.date.issued | 2015-04 | |
| dc.description.abstract | In this research, silica (SiO2), alumina (Al2O3) and zirconia (ZrO2) particles were treated with 3-(Trimethoxysilyl) propyl methacrylate (γ-MPS) and then incorporated into Bis-phenol A-glycidyl dimethacrylate (Bis-GMA)/triethylene glycol dimethacrylate (TEGDMA) to produce dental resin composite (DRC). This research was conducted in three different stages. The first stage was preparation of the DRCs based on the three different types of fillers, the second stage was prepared DRCs based on the mixture of the three different types of filler, and the third stage was prepared DRCs from the optimum ratio of the mixture of the three types of filler. The DRCs were polymerised with light curing unit. The DRCs samples were tested according to ISO 4049:2009 standards, for physical, mechanical, and environmental properties. Samples were also tested for their thermal properties. The cytotoxic assessment was carried out according to ISO 10993-5:2009 standards. The results showed that the DRC density increased as filler loading increase. The fracture toughness (KIC) and flexural strength (FS) were decreased as filler loading increased. On the other hand, the increase of filler loading resulted in the significantly increase of the radiopacity, flexural modulus (FM) and Vickers hardness (VH) of the DRC. In addition, the thermal stability, water and artificial saliva absorption and solubility were improved as filler loading increase. Moreover, the use of mixture filler as fillers type content has an effect on the DRC properties. The radiopacity was significantly increased as ZrO2 increased while the KIC and the FS decreased as SiO2 increased. On other hand, there were no significant differences in the FM values. As the mixture of fillers (optimum ratio 70 SiO2:10 Al2O3:20 ZrO2) loading increase, the optical density was significantly decreased from 1.84 to 0.36, however FM and VH were increased from 4.94 to 12.51 and from 14.4 to 31.0, respectively. In addition, absorption and solubility in water were significantly improved to 18.56 μg/mm3 and 3.05 μg/mm3, respectively. Similar behavior when exposed to artificial saliva which improved to 12.67 μg/mm3 and 2.71 μg/mm3, respectively. In contrast, the KIC and FS were decreased to 1.64 MPa.m1/2 and 54.97 MPa, respectively. Finally the cytotoxic assessment shows negligible effect on the 3T3-L1 cell line. In short, properties of the fabricated DRCs can be adjusted by the suitable combination of those three ceramic fillers used whereby specifically SiO2 improved the FM, Al2O3 improved VH and ZrO2 improved the radiopacity. Therefore, the combination of these three ceramic fillers managed to provide the best synergy for better quality of DRCs. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/2041 | |
| dc.subject | Fabrication And Evaluation Of Dental Resin Composites Developed | en_US |
| dc.subject | From Bis-Gma/Tegdma With Treated Ceramic Fillers | en_US |
| dc.title | Fabrication And Evaluation Of Dental Resin Composites Developed From Bis-Gma/Tegdma With Treated Ceramic Fillers | en_US |
| dc.type | Thesis | en_US |
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