IADR Abstract Archives
Mechanical Properties of Novel Injectable Composite Resin, G-ænial Universal Injectable
Objectives: Injectable composite resins are widely used in many clinical cases because of their handling properties. However, mechanical properties such as flexural strength, gloss retention and wear resistance have been desired to be improved. To resolve these problems, we optimized monomer composition and introduced new surface treatment technology of glass fillers to develop the novel injectable composite resin, G-ænial Universal Injectable (GUI).
Methods: Six materials were selected for analysis, GUI (GC), G-ænial Universal Flo (GUF, GC), Filtek Supreme Ultra (FSU, 3M), Filtek Supreme Ultra Flow (FSUF, 3M), Tetric EvoFlow (TEF, Ivoclar Vivadent) and Premise Flowable (PF, Kavo Dental Excellence). The specimens were prepared in accordance with ISO 4049. The bending test was conducted with a crosshead speed of 1 mm/min (AG-IS, SHIMADZU). The data were analyzed by one-way ANOVA, Tukey’s (p<0.05).
Results: Figure shows flexural strength for GUI, GUF, FSU, FSUF, TEF and PF. Same superscript means no significant different. GUI shows the highest flexural strength in this study due to optimized monomer composition and the new surface treatment technology. Rigid monomers such as Bis-MEPP are chosen to harden the resin matrix. By using a new long alkyl chain silane coupling agent, filler surface becomes more hydrophobic. As a result, the adhesion between fillers and monomers is improved, and the hydrolysis hardly occurs. Therefore, not only flexural strength but also wear resistance are improved. Moreover, thanks to strong adhesion between resin and filler, we succeeded in introducing nano filler without loss of mechanical properties. Consequently, GUI keeps high gloss retention even after brushing. Moreover, by introducing the new technologies, discoloration after coffee immersion is decreased.
Conclusions: Thanks to the optimized monomer composition and the new surface treatment technology, we succeeded in developing GUI with superior mechanical properties.
Methods: Six materials were selected for analysis, GUI (GC), G-ænial Universal Flo (GUF, GC), Filtek Supreme Ultra (FSU, 3M), Filtek Supreme Ultra Flow (FSUF, 3M), Tetric EvoFlow (TEF, Ivoclar Vivadent) and Premise Flowable (PF, Kavo Dental Excellence). The specimens were prepared in accordance with ISO 4049. The bending test was conducted with a crosshead speed of 1 mm/min (AG-IS, SHIMADZU). The data were analyzed by one-way ANOVA, Tukey’s (p<0.05).
Results: Figure shows flexural strength for GUI, GUF, FSU, FSUF, TEF and PF. Same superscript means no significant different. GUI shows the highest flexural strength in this study due to optimized monomer composition and the new surface treatment technology. Rigid monomers such as Bis-MEPP are chosen to harden the resin matrix. By using a new long alkyl chain silane coupling agent, filler surface becomes more hydrophobic. As a result, the adhesion between fillers and monomers is improved, and the hydrolysis hardly occurs. Therefore, not only flexural strength but also wear resistance are improved. Moreover, thanks to strong adhesion between resin and filler, we succeeded in introducing nano filler without loss of mechanical properties. Consequently, GUI keeps high gloss retention even after brushing. Moreover, by introducing the new technologies, discoloration after coffee immersion is decreased.
Conclusions: Thanks to the optimized monomer composition and the new surface treatment technology, we succeeded in developing GUI with superior mechanical properties.
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