Naslov
Evaluating the impact of gamma sterilization on calcium phosphates composites with different TiO2 nanomaterials

Autori
Erceg, Ina ; Šegota, Suzana ; Maltar-Strmečki, Nadica ; Dutour Sikirić, Maja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Programme and abstract book 45th Annual Meeting of the European Radiation Research Society September 13 - 17 2020 Lund, Sweden / - Lund : ERRS ; Lund University, 2020

Skup
Digital 45th Annual Meeting of the European Radiation Research Society

Mjesto i datum
Lund, Švedska, 13.09.2020. - 17.09.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
EPR ; calcium phosfates ; TiO2

Sažetak
Introduction: Calcium phosphates (CaPs) composites with different TiO2 nanomaterials (TiNMs) have recently attracted attention as promising implant materials for hard tissue regeneration. In this study, influence of TiO2 nanoparticles (TiNPs) and titanate nanotubes (TiNTs) on CaPs spontaneous precipitation was investigated by AFM, SEM, FTIR, XRD and EPR. Methods: EPR analyses were performed to monitor the possible difference in local structure after the formation of CaP in the presence of TiNPs and TiNTs. All results were compared with the control system. Before irradiation, no EPR signal was detected for any samples supporting the quality of synthesis. To monitor changes in the microenvironment, the radiation-induced centers were used. The samples were irradiated at 25 kGy, in order to simultaneously validate the suitability of the gold standard for gamma sterilization. Results: In the presence of both TiNMs, at different concentrations, after one hour of reaction time CaDHA was the only formed crystalline phase. Experimental spectra of CaP formed in the presence of TiNPs and TiNTs and theoretical results show the same features and simulation parameters as control, indicating contributions of same type of paramagnetic center. Conclusion: Therefore, it can be can concluded that the addition of the TiNPs and TiNTs does not induce changes in local structure of CaDHA. These findings are of importance for biomimetic preparation of CaP/TiNMs composites since they indicate that CaDHA composites with desired properties, could be prepared on different TiNMs without the need for a change of the experimental conditions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija, Javno zdravstvo i zdravstvena zaštita

POVEZANOST RADA