IADR Abstract Archives
Synthesis and Characterization of a Novel Bioactive Reinforced Glass Fiber based Dental Composites
Objectives: This study focused on the synthesis and characterizations of a newly developed bioactive based glass fiber reinforced dental composite and compared it with commercially available composite
Methods: For this study, laboratory prepared silanized bioactive glass fibers were used. Three experimental groups of composites (Exp-RBC) were prepared by mixing the dimethacrylate monomers and inorganic reinforcing agents in varying concentrations (40%, 50%, 60% wt/wt). FiltekTM Z350 [(3M ESPE, Germany), CT-Z350] and unfilled resins (CT-UF) were used as control groups. Structural analysis and degree of conversion (DC) of prepared samples were evaluated by using Fourier Transform Infrared Spectroscopy (FTIR) while surface morphology was evaluated by Scanning Electron Microscope (SEM). Vicker’s micro-Hardness (VHN) was evaluated by keeping load at 200g and dwell time was set at 10s. Thermo-gravimetric Analysis/ Differential Scanning Calorimetry (TGA/DSC) was performed from 25-600 oC. To evaluate the weight change, polymerized samples were investigated at 1, 7, 21 and 40 days by immersion in deionized water and phosphate buffer solution at 37°C.
Results: All experimental composite groups showed homogenous distribution of reinforcing agents. A significant difference in DC among all groups was observed by calculating the differences in unpolymerized and polymerized aliphatic (1638 cm-1) and aromatic (1608 cm-1) peaks. The sequence observed was CT-UF (82%) > Exp-RBC 40 (71%) > Exp-RBC 50 (65%) > Exp-RBC 60 (56%) > CT-Z350 (50%). The VHN and glass transition temperature (Tg) values were increased with higher concentrated composites, where CT-Z350 showed (69.98, 119 oC) and Exp-RBC 60 showed (61.89, 98.2 oC) respectively. Unfilled resins showed the highest water absorption and thermal weight loss. The observed sequence was CT-UF > Exp-RBC 40 > Exp-RBC 50 > Exp-RBC 60 > CT-Z350.
Conclusions: This newly developed composite showed promising results with comparable mechanical and physical properties, however, further investigations are required for clinical application.
Methods: For this study, laboratory prepared silanized bioactive glass fibers were used. Three experimental groups of composites (Exp-RBC) were prepared by mixing the dimethacrylate monomers and inorganic reinforcing agents in varying concentrations (40%, 50%, 60% wt/wt). FiltekTM Z350 [(3M ESPE, Germany), CT-Z350] and unfilled resins (CT-UF) were used as control groups. Structural analysis and degree of conversion (DC) of prepared samples were evaluated by using Fourier Transform Infrared Spectroscopy (FTIR) while surface morphology was evaluated by Scanning Electron Microscope (SEM). Vicker’s micro-Hardness (VHN) was evaluated by keeping load at 200g and dwell time was set at 10s. Thermo-gravimetric Analysis/ Differential Scanning Calorimetry (TGA/DSC) was performed from 25-600 oC. To evaluate the weight change, polymerized samples were investigated at 1, 7, 21 and 40 days by immersion in deionized water and phosphate buffer solution at 37°C.
Results: All experimental composite groups showed homogenous distribution of reinforcing agents. A significant difference in DC among all groups was observed by calculating the differences in unpolymerized and polymerized aliphatic (1638 cm-1) and aromatic (1608 cm-1) peaks. The sequence observed was CT-UF (82%) > Exp-RBC 40 (71%) > Exp-RBC 50 (65%) > Exp-RBC 60 (56%) > CT-Z350 (50%). The VHN and glass transition temperature (Tg) values were increased with higher concentrated composites, where CT-Z350 showed (69.98, 119 oC) and Exp-RBC 60 showed (61.89, 98.2 oC) respectively. Unfilled resins showed the highest water absorption and thermal weight loss. The observed sequence was CT-UF > Exp-RBC 40 > Exp-RBC 50 > Exp-RBC 60 > CT-Z350.
Conclusions: This newly developed composite showed promising results with comparable mechanical and physical properties, however, further investigations are required for clinical application.