Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized Hydroxyapatite
Surface charges on implants improve integration into bone and so require a clear protocol for achieving a surface charge and comparable results from different laboratories. This study sintered hydroxyapatite (HAp) at one laboratory to remove the influence of the microstructure on surface charge and...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Journal of Functional Biomaterials |
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| Online Access: | https://www.mdpi.com/2079-4983/14/2/100 |
| _version_ | 1797620098738946048 |
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| author | Darta Ubele-Kalnina Miho Nakamura Karlis Agris Gross |
| author_facet | Darta Ubele-Kalnina Miho Nakamura Karlis Agris Gross |
| author_sort | Darta Ubele-Kalnina |
| collection | DOAJ |
| description | Surface charges on implants improve integration into bone and so require a clear protocol for achieving a surface charge and comparable results from different laboratories. This study sintered hydroxyapatite (HAp) at one laboratory to remove the influence of the microstructure on surface charge and then polarized/depolarized the pellets at two different laboratories (in Tokyo and Riga). Surface charges on HAp pellets induced by electric polarization at 400 °C in a 5 kV/cm DC electric field were measured by the thermally stimulated depolarization current (TSDC) method as 6–9 µC/cm<sup>2</sup>. The surface charge results were comparable between laboratories and also agreed with previously documented values. Recommendations describe conditions for polarization and depolarization to generate a surface charge and repeatedly achieve a comparable outcome. A visual display of the polarization mechanisms and the contribution to surface charge point to further aspects that need further development. |
| first_indexed | 2024-03-11T08:36:58Z |
| format | Article |
| id | doaj.art-09187eba07bf477fb89185795961b1f5 |
| institution | Directory Open Access Journal |
| issn | 2079-4983 |
| language | English |
| last_indexed | 2024-03-11T08:36:58Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Functional Biomaterials |
| spelling | doaj.art-09187eba07bf477fb89185795961b1f52023-11-16T21:24:39ZengMDPI AGJournal of Functional Biomaterials2079-49832023-02-0114210010.3390/jfb14020100Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized HydroxyapatiteDarta Ubele-Kalnina0Miho Nakamura1Karlis Agris Gross2Institute of Materials and Surface Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Street 7, LV-1048 Riga, LatviaMedicity Research Laboratory, Faculty of Medicine, University of Turku, Tykistökatu 6, 20520 Turku, FinlandInstitute of Materials and Surface Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Street 7, LV-1048 Riga, LatviaSurface charges on implants improve integration into bone and so require a clear protocol for achieving a surface charge and comparable results from different laboratories. This study sintered hydroxyapatite (HAp) at one laboratory to remove the influence of the microstructure on surface charge and then polarized/depolarized the pellets at two different laboratories (in Tokyo and Riga). Surface charges on HAp pellets induced by electric polarization at 400 °C in a 5 kV/cm DC electric field were measured by the thermally stimulated depolarization current (TSDC) method as 6–9 µC/cm<sup>2</sup>. The surface charge results were comparable between laboratories and also agreed with previously documented values. Recommendations describe conditions for polarization and depolarization to generate a surface charge and repeatedly achieve a comparable outcome. A visual display of the polarization mechanisms and the contribution to surface charge point to further aspects that need further development.https://www.mdpi.com/2079-4983/14/2/100electric polarizationthermally stimulated depolarization currentshydroxyapatitesurface charge |
| spellingShingle | Darta Ubele-Kalnina Miho Nakamura Karlis Agris Gross Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized Hydroxyapatite Journal of Functional Biomaterials electric polarization thermally stimulated depolarization currents hydroxyapatite surface charge |
| title | Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized Hydroxyapatite |
| title_full | Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized Hydroxyapatite |
| title_fullStr | Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized Hydroxyapatite |
| title_full_unstemmed | Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized Hydroxyapatite |
| title_short | Inter-Laboratory Study on Measuring the Surface Charge of Electrically Polarized Hydroxyapatite |
| title_sort | inter laboratory study on measuring the surface charge of electrically polarized hydroxyapatite |
| topic | electric polarization thermally stimulated depolarization currents hydroxyapatite surface charge |
| url | https://www.mdpi.com/2079-4983/14/2/100 |
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