Characterisation of NiTi orthodontic archwires characteristic functional properties
Само за регистроване кориснике
2017
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The aim of this paper was to analyse the characteristic properties of different commercially available NiTi archwires (diameter 0.014 ''). Characteristic properties were determined by using DSC analysis for identification of phase temperatures and a tensile test for obtaining the mechanical properties, while semi-quantitative EDS analysis was used for their chemical composition. Analysis of phase temperatures showed that nickel- titanium orthodontic archwires, in the austenitic phase, were exhibiting superelastic effect in the oral environment (T=37 degrees C). The uniaxial stress-strain curves showed different values for the beginning and the end of loading due to the stress and transformation range. The investigation of the chemical composition showed an equiatomic NiTi alloy. The aim of the first phase of biocompatibility assessment of Ni-Ti archwires was to investigate the potential cytotoxicity on a model of rat thymocytes, where a direct contact exists between the archwire and th...e cells. The test was chosen because of the high sensitivity of thymocytes to proapoptotic stimuli and because the test includes the culture of non-adherent, non-proliferating cells, such as thymocytes, which is much more convenient for the evaluation of a material's cytotoxicity in direct contact, compared to the adherent cells such as fibroblasts. The experiment was designed to cultivate the Ni-Ti archwire samples with rat thymocytes, using different surface-over-volume ratios of the archwires in complete medium. The cytotoxic effect was evaluated by measuring the apoptosis. The aim of the second phase of the study was to investigate further the cytotoxic effects of Ni-Ti archwires in the short-term (24h) and long-term (48h) cultures of rat's thymocytes, which are highly sensitive to pro-apoptotic stimuli, where a direct contact exists between archwires and the cells.
Кључне речи:
archwires / Shape Memory Effect / super-elasticity / phase transformation / thermal analysis / tensile test / microstructure / biocompatibility testingИзвор:
Proceedings of the International Conference on Medical & Biological Engineering 2017 (Cmbebih 2017, 2017, 62, 323-332Издавач:
- Springer-Verlag Singapore Pte Ltd, Singapore
DOI: 10.1007/978-981-10-4166-2_49
ISSN: 1680-0737
WoS: 000462537100049
Scopus: 2-s2.0-85016076159
Колекције
Институција/група
Stomatološki fakultetTY - CONF AU - Rudolf, Rebeka AU - Fercec, Janko AU - Lazić, Vojkan AU - Veselinović, Valentina AU - Tomić, Sergej PY - 2017 UR - https://smile.stomf.bg.ac.rs/handle/123456789/2201 AB - The aim of this paper was to analyse the characteristic properties of different commercially available NiTi archwires (diameter 0.014 ''). Characteristic properties were determined by using DSC analysis for identification of phase temperatures and a tensile test for obtaining the mechanical properties, while semi-quantitative EDS analysis was used for their chemical composition. Analysis of phase temperatures showed that nickel- titanium orthodontic archwires, in the austenitic phase, were exhibiting superelastic effect in the oral environment (T=37 degrees C). The uniaxial stress-strain curves showed different values for the beginning and the end of loading due to the stress and transformation range. The investigation of the chemical composition showed an equiatomic NiTi alloy. The aim of the first phase of biocompatibility assessment of Ni-Ti archwires was to investigate the potential cytotoxicity on a model of rat thymocytes, where a direct contact exists between the archwire and the cells. The test was chosen because of the high sensitivity of thymocytes to proapoptotic stimuli and because the test includes the culture of non-adherent, non-proliferating cells, such as thymocytes, which is much more convenient for the evaluation of a material's cytotoxicity in direct contact, compared to the adherent cells such as fibroblasts. The experiment was designed to cultivate the Ni-Ti archwire samples with rat thymocytes, using different surface-over-volume ratios of the archwires in complete medium. The cytotoxic effect was evaluated by measuring the apoptosis. The aim of the second phase of the study was to investigate further the cytotoxic effects of Ni-Ti archwires in the short-term (24h) and long-term (48h) cultures of rat's thymocytes, which are highly sensitive to pro-apoptotic stimuli, where a direct contact exists between archwires and the cells. PB - Springer-Verlag Singapore Pte Ltd, Singapore C3 - Proceedings of the International Conference on Medical & Biological Engineering 2017 (Cmbebih 2017 T1 - Characterisation of NiTi orthodontic archwires characteristic functional properties VL - 62 SP - 323 EP - 332 DO - 10.1007/978-981-10-4166-2_49 ER -
@conference{ author = "Rudolf, Rebeka and Fercec, Janko and Lazić, Vojkan and Veselinović, Valentina and Tomić, Sergej", year = "2017", abstract = "The aim of this paper was to analyse the characteristic properties of different commercially available NiTi archwires (diameter 0.014 ''). Characteristic properties were determined by using DSC analysis for identification of phase temperatures and a tensile test for obtaining the mechanical properties, while semi-quantitative EDS analysis was used for their chemical composition. Analysis of phase temperatures showed that nickel- titanium orthodontic archwires, in the austenitic phase, were exhibiting superelastic effect in the oral environment (T=37 degrees C). The uniaxial stress-strain curves showed different values for the beginning and the end of loading due to the stress and transformation range. The investigation of the chemical composition showed an equiatomic NiTi alloy. The aim of the first phase of biocompatibility assessment of Ni-Ti archwires was to investigate the potential cytotoxicity on a model of rat thymocytes, where a direct contact exists between the archwire and the cells. The test was chosen because of the high sensitivity of thymocytes to proapoptotic stimuli and because the test includes the culture of non-adherent, non-proliferating cells, such as thymocytes, which is much more convenient for the evaluation of a material's cytotoxicity in direct contact, compared to the adherent cells such as fibroblasts. The experiment was designed to cultivate the Ni-Ti archwire samples with rat thymocytes, using different surface-over-volume ratios of the archwires in complete medium. The cytotoxic effect was evaluated by measuring the apoptosis. The aim of the second phase of the study was to investigate further the cytotoxic effects of Ni-Ti archwires in the short-term (24h) and long-term (48h) cultures of rat's thymocytes, which are highly sensitive to pro-apoptotic stimuli, where a direct contact exists between archwires and the cells.", publisher = "Springer-Verlag Singapore Pte Ltd, Singapore", journal = "Proceedings of the International Conference on Medical & Biological Engineering 2017 (Cmbebih 2017", title = "Characterisation of NiTi orthodontic archwires characteristic functional properties", volume = "62", pages = "323-332", doi = "10.1007/978-981-10-4166-2_49" }
Rudolf, R., Fercec, J., Lazić, V., Veselinović, V.,& Tomić, S.. (2017). Characterisation of NiTi orthodontic archwires characteristic functional properties. in Proceedings of the International Conference on Medical & Biological Engineering 2017 (Cmbebih 2017 Springer-Verlag Singapore Pte Ltd, Singapore., 62, 323-332. https://doi.org/10.1007/978-981-10-4166-2_49
Rudolf R, Fercec J, Lazić V, Veselinović V, Tomić S. Characterisation of NiTi orthodontic archwires characteristic functional properties. in Proceedings of the International Conference on Medical & Biological Engineering 2017 (Cmbebih 2017. 2017;62:323-332. doi:10.1007/978-981-10-4166-2_49 .
Rudolf, Rebeka, Fercec, Janko, Lazić, Vojkan, Veselinović, Valentina, Tomić, Sergej, "Characterisation of NiTi orthodontic archwires characteristic functional properties" in Proceedings of the International Conference on Medical & Biological Engineering 2017 (Cmbebih 2017, 62 (2017):323-332, https://doi.org/10.1007/978-981-10-4166-2_49 . .