Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties
Abstract Objective The objective of this study is to disperse europium oxide (Eu2O3) in a resin composite (RC) using a planetary centrifugal mixer and assess its effects on photoluminescence and mechanical properties. Materials and methods A commercially available RC was mixed with Eu2O3 at various...
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| Format: | Article |
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Nature Publishing Group
2025-02-01
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| Series: | BDJ Open |
| Online Access: | https://doi.org/10.1038/s41405-025-00304-0 |
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| author | Yuta Utsumi Masatsugu Oishi Kazuhide Yonekura Masaomi Ikeda Yusuke Matsuki Kenichiro Ohge Tomoki Iuchi Keiichi Hosaka |
| author_facet | Yuta Utsumi Masatsugu Oishi Kazuhide Yonekura Masaomi Ikeda Yusuke Matsuki Kenichiro Ohge Tomoki Iuchi Keiichi Hosaka |
| author_sort | Yuta Utsumi |
| collection | DOAJ |
| description | Abstract Objective The objective of this study is to disperse europium oxide (Eu2O3) in a resin composite (RC) using a planetary centrifugal mixer and assess its effects on photoluminescence and mechanical properties. Materials and methods A commercially available RC was mixed with Eu2O3 at various concentrations using a planetary centrifugal mixer. The fabricated samples were evaluated using scanning electron microscopy and a spectrofluorometer to assess their crystal structures, particle sizes, and photoluminescence properties. Vickers microhardness measurements were performed, along with a three-point bending test. Statistical analyses were performed to assess the mechanical properties. Results The intensity of red fluorescence increased with the increase of europium oxide concentration. The fluorescence spectra at 613 and 620 nm exhibited higher intensities under excitation at 254 nm. Eu2O3 was dispersed in RC regardless of the Eu2O3 concentration, and no aggregation was observed. Regarding the mechanical properties, there were no significant differences in the flexural strength or modulus, and the Vickers hardness gradually increased with increasing Eu2O3 concentration. Conclusion To mix Eu2O3 with RC, visible fluorescence emission was observed even with increasing the Eu2O3 concentration, and the mechanical properties of RC were unaffected. Based on our study, a 15 wt% concentration of Eu₂O₃ is the appropriate concentration, as it achieves strong fluorescence emission without compromising the mechanical properties or color tone of the RC. |
| format | Article |
| id | doaj-art-d97644f6b143434c8c0e005a31681294 |
| institution | Kabale University |
| issn | 2056-807X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | BDJ Open |
| spelling | doaj-art-d97644f6b143434c8c0e005a316812942025-02-09T12:51:27ZengNature Publishing GroupBDJ Open2056-807X2025-02-011111710.1038/s41405-025-00304-0Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical propertiesYuta Utsumi0Masatsugu Oishi1Kazuhide Yonekura2Masaomi Ikeda3Yusuke Matsuki4Kenichiro Ohge5Tomoki Iuchi6Keiichi Hosaka7Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical SciencesIndustrial and Social Science, Tokushima University Graduate School of TechnologyRegenerative Dental Medicine, Tokushima University Graduate School of Biomedical SciencesDepartment of Oral Prosthetic Engineering, Tokyo Medical and Dental University Graduate School of Medical and Dental SciencesRegenerative Dental Medicine, Tokushima University Graduate School of Biomedical SciencesRegenerative Dental Medicine, Tokushima University Graduate School of Biomedical SciencesRegenerative Dental Medicine, Tokushima University Graduate School of Biomedical SciencesRegenerative Dental Medicine, Tokushima University Graduate School of Biomedical SciencesAbstract Objective The objective of this study is to disperse europium oxide (Eu2O3) in a resin composite (RC) using a planetary centrifugal mixer and assess its effects on photoluminescence and mechanical properties. Materials and methods A commercially available RC was mixed with Eu2O3 at various concentrations using a planetary centrifugal mixer. The fabricated samples were evaluated using scanning electron microscopy and a spectrofluorometer to assess their crystal structures, particle sizes, and photoluminescence properties. Vickers microhardness measurements were performed, along with a three-point bending test. Statistical analyses were performed to assess the mechanical properties. Results The intensity of red fluorescence increased with the increase of europium oxide concentration. The fluorescence spectra at 613 and 620 nm exhibited higher intensities under excitation at 254 nm. Eu2O3 was dispersed in RC regardless of the Eu2O3 concentration, and no aggregation was observed. Regarding the mechanical properties, there were no significant differences in the flexural strength or modulus, and the Vickers hardness gradually increased with increasing Eu2O3 concentration. Conclusion To mix Eu2O3 with RC, visible fluorescence emission was observed even with increasing the Eu2O3 concentration, and the mechanical properties of RC were unaffected. Based on our study, a 15 wt% concentration of Eu₂O₃ is the appropriate concentration, as it achieves strong fluorescence emission without compromising the mechanical properties or color tone of the RC.https://doi.org/10.1038/s41405-025-00304-0 |
| spellingShingle | Yuta Utsumi Masatsugu Oishi Kazuhide Yonekura Masaomi Ikeda Yusuke Matsuki Kenichiro Ohge Tomoki Iuchi Keiichi Hosaka Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties BDJ Open |
| title | Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties |
| title_full | Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties |
| title_fullStr | Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties |
| title_full_unstemmed | Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties |
| title_short | Effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties |
| title_sort | effects of mixing of europium oxide in resin composites on the fluorescence characteristics and mechanical properties |
| url | https://doi.org/10.1038/s41405-025-00304-0 |
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